My husband had a cardio-cath done last week and i have a question not in the literature. he has no discoloration or swelling at the incision site but has a huge hard lump under the skin. should i insist on his going to the er?

I : I assume this was done through the groin, not the arm. It's very common to have a painful bump in the area they inserted the catheter. It will last a week or so. They should have advised him to avoid stairs and lifting for a week. If he were bleeding under his skin, the entire area would be swelling, and he'd be feeling weak and light-headed. When in doubt, call the cardiologist who did the catheterization. I'm speaking from personal experience, not as a podiatrist. It took a week for my pain and bump to go down. Who would have thought that the way to a man's heart is through his groin? Hope this helps.