<s>[INST] I m a 46 yr old female and have been in excellent health most of my life. I just noticed a lump about the size of a golf ball at my waistline on the left side. It doesn t hurt, and there is no discoloration of my skin and no rash. Should I see a doctor? [/INST] Hi! Thanks for your query on Chat Doctor ! After going through the description of your asymptomatic lump on the waistline, if I were your primary physician, I would like to consider following possibilities as per my experience of needle biopsies of lumps of different types of various regions:1. A bursa or benign cystic tumor like sebaceous cyst etc.2. Solid benign tumor or tumor-like conditions like lipoma, neurofibroma, dermatofibroma etc.3. Enlarged lymph node due to infections4. Herniation of abdominal contents5. Hemangioma or vascular malformation etc. Therefore, in any case it is benign and considering your age you have to confirm this; please see your physician today for a close examination and if needed a needle biopsy!regards, </s>