hello welcome to HCM i have read your question and can understand your concerns. what is your age are you diabetic are you on steroids or any other immunosuppresant therapy is there any discharge coming out of these lumps. if i were your treating physician i would have looked at the lumps and determined their mobility beneath the skin ie inflamed lipoma.i would have done skin pinch to rule out inflamed sebaceous cysts,fluctuation test to rule out any abscess.another possibility is pilonidal sinus or abscess whic occurs in the cleft of the buttocks and branching may occur. for inflammed lipoma and boils i would have prescribed oral anti inflammatory drugs such as ibuprofen or diclofenac 50 mg, an anti biotic such as combination of ampicillin and flucloxicillin which are active against staphylococcus which is usually the culprit bug. abscess need incision and drainage.sebaceous cyst needs surgical excision and pilonidal sinus or abscess will also need excision by karydakis procedure. thanks hope the answer is helpful keep using HCM. regards