Have a cyst on my back it is purple my bra strap is irrating the bump and it is tender.i lanced it nothing came out but blood it is swollen?

Cysts are common: Cysts are very common, and many people will have them removed by a general surgeon. this is technically very easy and can be done under local anesthesia in the clinic or in the operating room. the most common reason to have one removed is because it is bothersome or causes pain. Healing after surgery usually occurs within 2 to 3 weeks with minimal discomfort or pain.