<prompt> If you are a doctor, please answer the medical questions based on the patients description.i ve had a pimple like bump on the bac of my neck for a while now it doesn t hurt but when squeezed a foul smelling puss comes out. sorry i don t feel comfortable giving out my cc information over the internet tanks though you have the email if you feel like helping me. Thanks  <response>: Hi, dairy have gone through your question. I can understand your concern. Pimple like lump with foul smelling material is suggestive of sebaceous cyst or Desmond cyst. It is purely benign lesionnon-cancerous you should go for complete excision of lump. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. 