It is ascribed to poor trimming of the nails in combination with local pressure due to ill-fitting footwear, hyperhidrosis, poor foot hygiene and nail abnormalities. Pain, swelling and discharge are the main clinical features. [ijdvl.com]

Simple cure for the ingrown toenailAust Fam Physician1998274299 PearsonHJBuryRNWapplesJWatkinDFIngrowing toenails: is there a nail abnormality? A prospective studyJ Bone Joint Surg Br19876958402 [cfp.ca]

Ingrowing toenails: is there a nail abnormality? A prospective study. J Bone Joint Surg Br 1987;69(5):840–2. [web.archive.org]

Abnormal curvature of the toenails, caused due to genetic defects Infection of the nail Poor foot hygiene Excessive sweating Individuals, who have a family history of Ingrown Toenails may have an increased risk of the condition What are the Signs and [dovemed.com]

The idea The idea behind the toenail brace is to lift up the side(s) of the nail and at the same time force the nail into a normal flat structure - pretty much like the dentist does to correct our teeth. History of the toenail brace. [toenail_brace.atheart.dk]

Blue discoloration of the nails is called nail bed cyanosis, a sign of poorly oxygenated blood. Nail pitting, tiny holes in the nail surface, is a classical sign of psoriasis. [astoriapodiatrist.com]

Jordan Metzl discusses the symptoms of ingrown toenails, and provides advice on treating and preventing the troublesome foot pain. Dr. [triathlon.competitor.com]

Alternatively, if you want help working out what is causing your foot pain, visit the foot pain diagnosis section. [foot-pain-explored.com]

Symptoms and signs of infection can include swelling, redness, streaking (redness spreading from the toe to middle of the foot), pain, mal-odor, and drainage that may be yellow, green, or white and purulent (containing pus). [medicinenet.com]

Complications of sodium hydroxide chemical matrixectomy: nail dystrophy, allodynia, hyperalgesia. J Am Podiatr Med Assoc. 2014 Nov. 104 (6):649-51. [Medline]. Terzi E, Guvenc U, Türsen B, Kaya TI, Erdem T, Türsen Ü. [emedicine.com]