The perineum, buttocks and perianal folds are often included.
[medsci.org]
Acute symptoms last anywhere from one to four months.
[britannica.com]
Symptoms that can occur include mild fever, headache, fatigue, loss of appetite, nausea and vomiting, diarrhea, muscle and joint pain, abdominal pain, a skin rash, and jaundice
[emoryhealthcare.org]