What causes an infected cyst in the underarm?
Patient: I've just had a painful cyst removed from under my arm the doctor has sent swabs and the capsule for testing, i thought it wasnt too big, id only had it a week, but according to my doctor it was infected and very deep,:what are the possible diagnosis for this problem? Doctor: Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.   I have gone through your query regarding Infected sebaceous cyst. Sebaceous cysts are common non cancerous cysts of the skin. Common tests used for a sebaceous cyst include:●     Physical examination●     Medical history●     CT scans, helps to find the best route for surgery and to spot abnormalities●     ultrasounds, which identify the contents of the cyst●     punch biopsy, which involves removal of a small amount of tissue from the cyst to be examined in a laboratory for signs of cancer    A sebaceous cyst is treated by draining it or by surgically removing it. Normally, cysts are removed. This isn’t because they’re dangerous but rather for cosmetic reasons. Since most cysts aren’t harmful to your health, you can choose the treatment option that works for you.   It’s important to remember that without surgical removal, your cyst will usually come back. The best treatment is to ensure complete removal through surgery. Some people do decide against surgery, however, because it can cause scarring.   One of these methods are followed for cyst removal:1.     Conventional wide excision, which completely removes a cyst but can leave a long scar.2.     Minimal excision, which causes minimal scarring but carries a risk that the cyst will return.3.     Laser with punch biopsy excision, which uses a laser to make a small hole to drain the cyst of its contents   After your cyst is removed, you can use antibiotic ointment to prevent infection. You should use this until the healing process is complete. You can also use a scar cream to reduce the appearance of any surgical scars.  Hope I have answered your query. Let me know if I can assist you further.