Smelly bump/sebaceous cyst on back of shoulder

Ask 1 : my b/f has a bump on his back which has been there for ages. I noticed it had a white head on it so i squeezed it and white pus came out just like a normal pimple. i have to add that this spot doesn't hurt him at all. Another thing that we have noticed is that the pus smells really bad and is very thick. what can this be? i heard of something called a sebaceous cyst.

Has anyone had this?

Ask 2 : What your husband may have is a sebaceous cyst. These often start from a swollen hair follicle. Usually these cause no pain, but sometimes can become infected, painful and swollen. Foul smelling discharge may occur. Placing a warm cloth over the area may assist in promoting drainage and healing.

Although these cysts are not dangerous your healthcare provider should examine the area to rule out the possibilities of skin cancer.

Thanks for submitting your question and good luck.