Hello, I have a big bump (cyst?) protruding out of my left thumb joint. I used to feel something similar in the base of my pointer finger but it has disappeared and reappeared here instead. It has been like this for around a year but seemed to have grown abit bigger now. It feels hard when pressed down, almost like a bone/cartilage. Today after cooking, it has gotten red and painful. Is it something to worry about? Would love to get some advice for this, thank you 🙂