I had a lap appendectomy a month ago and i have a tiny bump underneath the scar on my left. when i push or massage it, it hurts the whole side.normal.

Okay..., but...: To an extent, it's normally expected for some residual swelling usually from small expected tissue fluid such as blood. Generally speaking, it's ok and leave it alone as long as feeling less tender and smaller bumpy. It takes time with various pace among individuals. Meanwhile, try resisting the temptation to push it and minimize physical activity to strain abdominal muscles. More" ask surgeon.