Conversation: The conversation between human and AI assistant.
[|Human|] I had a heart catherization a week ago and have developed a lump under my skin at the incision about 3-4 days later. the incision looks find it is not bleeding, red or sore but I do have excessive bruising around my thigh  near the incision. What should I do?
[|AI|]  Hi, Thanks for writing to Chat Doctor, I am Chat Doctor. Angiography or cardiac catheterization is done through one of the major arteries in either your arm or the leg. Arteries are high pressure flow regions. Add to it the fact that they give blood thinner during the procedure which delays clotting of blood at the site where the prick was made. Due to this some blood from that high pressure area escapes from the artery and collects under the skin immediately after TGE procedure or during removal of arterial sheathThat blood is then broken down by the body to give a purplish color. It is not permanent and will disappear in due time. Meanwhile, if it causes pain you may use cold compresses or a sandbar to alleviate it hope this answered your question, if you have more feel free to ask. Regards