a small pimple like bump has appeared on the...

Symptomes and treatement of perianal hair follicle infection 
Hair follicle infection around the anal opening arise as a small pimple that is full of pus which is caused by bacterial infection, its asociated with pain and some times fever, it can progress to formation of perianal abscess that will cause sever pain and fever. Its treated using Flucloxacillin/Ampicillin 500 mg tab 4 times a day in addition to warm sits baths after defecation, If symptomes progressed consult a surgeon for further evaluation and to rule out hemorhoids formation.
Investigations 
The local anal exam is the major determinant of the cause to detect infection or hemorrhoids formation, Anoscope can be done to detect internal opening for perianal fistula 
Causes 

• Hair follicle infection 
• Hemorrhoids 
• Perianal abscess 
• Perianal fistula 

Our advice 
You are adviced to have a well balanced diet rich in fruits and vegetables, avoid smoking and have regular exercise