The signs and symptoms of muscle strain are varied and include:

• Inflammation and bruising at the site of injury
• Pain when the area is at rest and in motion
• Weakening of the muscles of the affected area and the neighboring tendons
• Failure to use the muscles
• Individuals may also hear the sound of “pop” in the joint at the time of injury
• Numbness in the affected area

• Fatigue

  Fifty volunteers were randomly assigned to use one of these hammers at a fatiguing pace of one strike every second, to seat 20 nails in a wood beam. [ncbi.nlm.nih.gov]

  Avoid Muscle Fatigue: Muscles help absorb energy, and restoring the strength of the muscle will help prevent re-injury. Muscles that are fatigued are more likely to be injured. [orthopedics.about.com]

  You can also suffer a fatigue-related muscle strain from sustained postures. Back muscle strain, shoulder and neck muscle strains are often postural fatigue-related muscle strains. [physioworks.com.au]

• Localized Edema

  This study investigated if using a shock-control hammer reduces forearm muscle strain by observing adverse physiological responses (i.e. inflammation and localized edema) after use. [ncbi.nlm.nih.gov]

• Asymptomatic

  We compared the MRI characteristics of symptomatic cases before and after healing and with asymptomatic controls. [ncbi.nlm.nih.gov]

• Vomiting

  Other medications, such as muscle relaxants and opioid pain relievers, may cause drowsiness, dizziness or lightheadedness, nausea and/or vomiting, or other side effects. [spine-health.com]

  English the most common side effects with sevoflo are low blood pressure, abnormally rapid breathing, muscle tenseness, excitation, a temporary inability to breathe, small muscle twitches and vomiting. [mymemory.translated.net]

• Nausea

  Other medications, such as muscle relaxants and opioid pain relievers, may cause drowsiness, dizziness or lightheadedness, nausea and/or vomiting, or other side effects. [spine-health.com]

• Low Back Pain

  Initial treatment of acute low back pain is to make the patient as comfortable as possible and reduce pain and inflammation as quickly as possible. Below we outline some simple steps to help relieve acute low back pain. [sportsinjuryclinic.net]

  See Back Muscles and Low Back Pain Lower back strain, also referred to as a pulled muscle, is caused by damage to the muscles and ligaments of the lower back. [spine-health.com]

  Lumbar (lower back) muscle strains and sprains are the most common causes of low back pain. The back is prone to this strain because of its weight-bearing function and involvement in moving, twisting and bending. [aans.org]

  Antidepressant medicines are sometimes offered for low back pain, in the belief that they can work as painkillers for this condition. The latest expert guidelines do not recommend using these medicines for low back pain. [bupa.co.uk]

• Neck Pain

  INTRODUCTION: Flight-induced neck pain is common in high performance jet pilots, with incidents frequently attributed to high G z flight maneuvers. [ncbi.nlm.nih.gov]

  Back and neck pain are among the most common conditions people suffer from. For some, back and neck pain is an annoyance or inconvenience; for others, it can be debilitating. [northwell.edu]

  Sport exercising injury Muscular Man suffering from low back and neck pain after workout at gym. Pain relief, chiropractic concept. Sport exercising injury Twisted ankle while jogging. [shutterstock.com]

  It can take several hours or longer for the pain and neck stiffness to reach their peak. The pain from a cervical muscle strain or sprain may affect your shoulder as well, but should not cause pain or numbness in your arm or hand. [depuysynthes.com]

• Thigh Pain

  Whether it’s your hamstring, quadriceps or adductor muscles, strained thigh muscles can be a pain. [boneandjointreading.com]

  Posterior thigh pain. In: Brukner P and Khan K, eds. Clinical sports medicine. London: McGrawHill, 1993. Ekstrand J, Gillquist J. The frequency of muscle tightness and injuries in soccer players. Am J Sports Med 1982;10: 75-8. Garrett WE. [physioroom.com]

• Muscle Tenderness

  Although the injured muscle is tender and painful, it has normal strength. Grade II strain. This is a moderate strain, with a greater number of injured fibers and more severe muscle pain and tenderness. [drugs.com]

• Myopathy

  […] basic patterns of abnormality is present: Abnormal anatomy with normal signal, i.e. accessory muscle Muscle atrophy, i.e. too much fat Muscle edema, i.e. too much water while retaining normal architecture due to muscle injury, myositis and imflammatory myopathy [radiologyassistant.nl]

• Irritability

  Systematic review: complementary and alternative medicine in the irritable bowel syndrome. Alimentary Pharmacology & Therapeutics, 23, 465-471. Hutton, J. (2005). Cognitive behaviour therapy for irritable bowel syndrome. [richtlijnendatabase.nl]

  Gently pushing range of movement (ROM) within comfortable limits early on is important to mobilise the tissue and prevent any scarring from becoming irritable and restrictive. [physiolounge.co.uk]

  Rash, itching or excessive skin irritation occurs. 2. Conditions worsen. 3. Symptoms persist for more than 7 days, or clean up and occur again within a few days. Keep away from Children to avoid accidental poisoning: 1. [reset.vova.com]

  The tearing of the muscle can also damage small blood vessels, causing local bleeding, or bruising, and pain caused by irritation of the nerve endings in the area. [webmd.com]

• Headache

  Strain (Abdominal) Thigh Strain Common Ligament Injuries AC Joint Injury ACL Injury Back Muscle Pain Cramps Dislocated Shoulder High Ankle Sprain Knee Ligament Injuries Lateral Collateral Ligament Medial Collateral Ligament Sprain Muscle Strain Neck Headache [physioworks.com.au]

  Next to headaches, back problems are the most common complaint to healthcare professionals. What causes a back strain or sprain? Twisting or pulling a muscle or tendon can result in a strain. [my.clevelandclinic.org]

  […] others), feeling sleepy, cold sores, fungal or bacterial infections, irritation of prostate gland, increased need to pass urine, ear or respiratory infections, sinusitis, stuffy or runny nose, abnormal hair texture, sensitivity to sunlight, migraine headache [mymemory.translated.net]

• Confusion

  Even if you aren't an athlete, muscle strains are some of the most common injuries; however, this type of injury is often confused with a sprain, so let's start by clarifying the difference. [study.com]

  Do not confuse this with a degenerative or impingement-type tear. Strain of the subscapularis muscle On the left a strain with partial tear of the subscapularis. [radiologyassistant.nl]

  Not to be confused with SPRAINS which are tears in ligaments. Muscle tears have 3 grades of severity: Grade 1, Grade 2, and Grade 3. [muscularstrength.com]

  English less common are pain at the place of injection, flushing, low or high blood pressure, dry or teary eyes, redness of skin or skin disorder, psoriasis, hives, nail disorder, feeling unwell, feeling faint, poor coordination, confusion, increased [mymemory.translated.net]

  Not to be confused with Sprain. Strain Other names Muscle strain, pulled muscle, torn muscle Two images of the same strain. One of the pictures was shot through a mirror. [en.wikipedia.org]

• Forgetful

  Don’t forget the increased risks for heart disease and hypertension. I learned that stress can play a much bigger role in back pain than most people know. [cure-back-pain.org]

  Often times those three are forgotten in training and this "forgetfulness" leads to injury. These areas need time to recover as well as muscle fibers. Avoid movements which may strain these parts of the body to minimize bodily damage and injury. [bodybuilding.com]

• Asthenia

  […] lisääntynyt lihasjännitys (hypertonia)  astma English increased muscle tone or tension (hypertonia) Last Update: 2017-04-26 Usage Frequency: 1 Quality: Finnish voimattomuus (astenia) ja lisääntynyt lihasjännitys (hypertonia) English feeling of weakness (asthenia [mymemory.translated.net]

A proper physical examination followed by X-ray is done to diagnose the condition. In physical examination the joints of the affected area are examined to understand the mobility and also identify the exact site of the tendon and ligament that is injured.

Post this; an X-ray may be done to confirm the finding. These are also done to rule out the possibility of fracture or injury to any bone. When physical examination and X-rays do not draw any appropriate finding, then magnetic resonance imaging (MRI) scan may also have to be carried out to for differential diagnosis. Magnetic resonance imaging may also be needed to identify the specific muscles that was injured during the strain [5].

Treatment regime largely depends on the extent of severity of the injury. In some cases, medications may do the needful, whereas in some cases, a blend of medications, therapy and surgery may be required to correct the strain. 

1. Medications: Mild anti–inflammatory medications may be prescribed for decreasing the inflammation and treating the pain in the affected area. These mediations also have pain relieving properties and include either ibuprofen or acetaminophen. Anti-fibrotic medications like suramin has been very promising in preventing scars after muscular strains [6].
2. Therapies: Certain therapies need to be carried out as soon as possible after the strain has occurred. These would help relieve the pain and arrest any further damage to the affected area. Application of ice to the area of strain helps in a great deal to reduce both pain and inflammation [7]. The affected area is put to rest and it should remain in that state until the diagnosis is made. Depending on severity of the injury immobilisation of the area with the help of splint or brace may be necessary. Warm compress using methyl salicylate patches on the affected muscles reduces pain and discomfort of the muscle strain [8].
3. Surgery: This is often the last resort and is considered when the strain cannot be healed through medications and therapies. Surgery is considered, when the muscles have ruptured or there is a torn ligament [9].

Muscle strains can be characterized under 3 different categories: grade I, grade II and grade III. In the initial stages – grade I, the individual may experience a sense of extreme pain in the affected area accompanied by inflammation. For grade I injuries, the patient is expected to recover within few weeks.

Whereas, grade II muscle strains may take longer duration to heal and the recovery period may be as long as 2 - 3 months. After proper treatment regime and physiotherapy the patient can regain his normal activities. Muscle strains pose no mortality but may cause significant morbidity if physical therapy of the affected muscle is delayed [3].

Patients suffering grade III type of muscle strain often have to undergo surgical procedures to regain normal mobility and activity. Post-operative care is of utmost importance in such cases and after rigorous treatment regime for several months the patient can gradually come back to normal life.

Complications

Complications can set in if timely treatment is not initiated. In addition, failure to appropriately diagnose the type of strain and its associated treatment regime can also call for complications to develop. The following is a list explaining the complications of muscle strains:

• Muscle pain that turns chronic in nature
• Muscular rupture
• The muscles of the affected area tighten
• Decreased mobility
• Muscle rupture
• Fluid accumulation in between affected muscles [4]

Causes of muscle strain are many and can be summarized as follows:

• A sudden jerk in an awkward position
• Lifting heavy objects in an incorrect posture
• Not warming up and stretching out properly before carrying out daily tasks [1]
• Fatigue
• Undue pressure on a particular muscle area which causes the muscle tendons to undergo wear and tear
• Playing sports such as tennis, golf and rowing
• Activities such as jumping, running and throwing
• Long hours of sitting posture which exerts strain on back muscle 

Muscle strain is a common phenomenon affecting many sportsperson and the common population. Statistics indicate that about 30% of all injuries are related to muscular injuries and strains.

Overuse or excessive pressure on a particular area can be a significant factor contributing to muscle strains. A strain usually occurs when the muscle tendons which are essentially fibrous tissues that connect the muscles to the bones experience wear and tear.

Tears to the muscles are usually found in the distal end because sarcomeres are less elastic in the ends than those in the central part [2]. The muscles of the lower back and the hamstring muscles of the thigh region are important areas for muscular strain.

An active lifestyle is the key to stay healthy and prevent unwanted muscle strains. Indulging in regular exercises such as stretching and muscle strengthening shall go a long way in preventing muscle strains [10]. In addition, selection of right footwear that would provide support and conditioning to the body muscles is a must.

Muscle strain is a common complaint experienced by millions of individuals across the globe. It is also referred to as “pulled muscle” which occurs due to damage to the muscle and its neighboring tendons.

The excessive pressure exerted while carrying out daily routine tasks results in muscle strain which can also cause local bleeding and inflammation of the affected area. Muscle strain occurs as a result of tearing of the fibers of the muscle along with its tendons.

This condition results in pain, irritation and bruising of the affected area. Muscle strains should not be ignored and be attended to as soon as possible to prevent further damage to the affected muscle area.

Definition

A muscle strain occurs when undue pressure is exerted on a specific area resulting into a damaged muscle.

Cause

This causes the affected area to swell and cause pain. There are various causes that give rise to muscle strain. These consist of sudden jerk, incorrect posture while lifting heavy object, long hours of sitting in a particular fashion and fatigue. All these activities or situations can cause muscle strain.

Symptoms

Symptoms of muscle strain include pain in the affected area when at rest and even at motion. The area is painful and gets inflamed. The individual is unable to use that part at all and there is generalized weakening of the muscles of that area.

Diagnosis

A muscle strain is usually diagnosed by a thorough physical examination accompanied by X-rays to rule out the possibility of any fracture of neighboring bone.

Treatment

Treatment regime generally includes rest along with therapies and medications. In case of severe or grade III type of muscle strains the doctors usually advice surgical procedures. 

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2. LeCroy CM, Reedy MK, Seaber AV. Limited sarcomere extensibility and strain injury in rabbit skeletal muscle. Trans Orthop Res Soc. 1989; 14:316.
3. Silder A, Thelen DG, Heiderscheit BC. Effects of prior hamstring strain injury on strength, flexibility, and running mechanics. Clin Biomech (Bristol, Avon). Aug 2010; 25(7):681-6.
4. Yilmaz C, Orgenc Y, Ergenc R, Erkan N. Rupture of the medial gastrocnemius muscle during namaz praying: an unusual cause of tennis leg. Comput Med Imaging Graph. Dec 2008; 32(8):728-31.
5. Koulouris G, Ting AY, Jhamb A, Connell D, Kavanagh EC. Magnetic resonance imaging findings of injuries to the calf muscle complex. Skeletal Radiol. Oct 2007; 36(10):921-7.
6. Chan YS, Li Y, Foster W, Fu FH, Huard J. The use of suramin, an antifibrotic agent, to improve muscle recovery after strain injury. Am J Sports Med. 2005; 33(1):43-51
7. Carvalho N, Puntel G, Correa P, Gubert P, Amaral G, Morais J, Royes L, da Rocha J, Soares F. Protective effects of therapeutic cold and heat against the oxidative damage induced by a muscle strain injury in rats.J Sports Sci. 2010; 28(9):923-35 
8. Higashi Y, Kiuchi T, Furuta K. Efficacy and safety profile of a topical methyl salicylate and menthol patch in adult patients with mild to moderate muscle strain: a randomized, double-blind, parallel-group, placebo-controlled, multicenter study. Clin Ther. 2010; 32(1):34-43 
9. Sallay PI, Ballard G, Hamersly S, et al. Subjective and functional outcomes following surgical repair of complete ruptures of the proximal hamstring complex. Orthopedics. Nov 2008;31(11):
10. Alonso JM, Edouard P, Fischetto G, Adams B, Depiesse F, Mountjoy M. Determination of future prevention strategies in elite track and field: analysis of Daegu 2011 IAAF Championships injuries and illnesses surveillance. Br J Sports Med. Jun 2012;46(7):505-14