How long will a sebaceous cyst heal?

2 to 4 wks after I/d: It take approx 2 to 4 wks for sebaceous cyst to heal depending on underlying illness like diabetes cancer etc.

After surgery. : 2 weeks on body or scalp. 1 week on face. Also size dependent.

Depends: Abx will NOT cure a sebaceous cyst. They can help clear the infection and surrounding cellulitis that can occur when the cyst becomes infected. .... but not the cyst itself. The cyst needs to be removed if bothering you. If not bothering you can be safely watched.