<s>[INST] Hi i have a reacurring lump on my left shoulder that has blood,and pusc,smells like vinegar,its invected,and hurts,tryyedn hot showers to open and drain it no luck,have a hydroculator but didnt get it hot enough,do i need to go the doctor,and get it drained/antibiotic,really cant afford thatn please what do i do. [/INST] Hi.based from your description, it could be an infected sebaceous cyst or an abscess formation from a previous infection. A consult with a doctor, preferably a general surgeon, is best for physical examination and clinical evaluation. Diagnostics (such as ultrasound) and medical (proper antibiotic regimen) and surgical (excision and/or incision and Chat Doctor.  Proper hygiene and daily wound care will also be recommended. Hope this helps. Good day!!~ </s>