<s>[INST] I have a golf ball sized lump on my right inner thigh (where the thigh meets my testicles) accompanied by a large purple bruise around it.. When squeezed it feels like it pops but nothing comes out of my leg.. When trying to drain the lump I get nothing but blood.. Sometimes a very bright red and other times a very dark colored blood. Any ideas? [/INST] Hi, Dear,Welcome with your query to Chat Doctor. Studied your query in full depth of its details. Reviewed it in context of your health concerns. Based On the facts, Dear, you need to consult Surgeon, It could be Varicose vein lump or could be boiled with cellulitis. Dual Image Doppler study and physical examination from Surgeon would fix the cause of the lump on the back of the leg. This reply would help you to plan further treatment soon with your treating doctors. Best of Luck and early recovery. Welcome any further query in this regard, which would be replied in next session. Good Day!! Chat Doctor. N. Senior Surgical Specialist. S. Genl-CVTS </s>