<s>[INST] Yesterday, I noticed a lump on my forearm (approximately 2.5 inches from my wrist). There is no visible bruising, but the lump is very painful to the touch. This morning, the lump was slightly larger and is causing pain to shoot into my hand. Two days prior to noticing the lump, I gave blood for the first time. Is this related? [/INST] Hi, Dear thanks for the query to Chat Doctor virtual clinic. I studied your query in full details updated from you. I understood your health concernsBased on your query data, In my opinion, Dear You seem to suffer from post-blood donation blood clot at the leaked out Venus puncture accompanied by thrombophlebitis.Thus, the blood donation is related to your forearm lump with bruising of the site. Hope this reply would help you to evaluate your case and treat it with your doctors in time to come. Hope this would resolve your query and worry and Anxiety accompanied by it. Welcome for any further query in this regard to ME. I would love to help you out.Awaiting any further query. Wish you fast recovery from this intriguing health problem. Have a Good Day. Chat Doctor. N.M.S. Genl-CVTS -Senior Surgical Consultant </s>