Cysts are the collection of fluid or a semi-solid substance inside an encompassing wall. They can be located on any part of the body. Commonly seen are epidermal cysts, also known as sebaceous cysts which are derived from the hair follicle. The cysts contain a putty-like substance called sebum which collects inside causing the cyst to slowly increase in size. At times, the cyst gets infected and the cyst turns into an abscess. The treatment is surgery. In the acutely infected stage, it is only possible to drain the pus. The cyst may recur as it is imperative to remove the wall of the cyst which secretes the inner contents. In the uninfected state, it is possible to remove the entire cyst completely and hence avoid a recurrence.