My LO is 3 months plus. Not sure if he is teething or just hungry. He keep on sucking and biting his hand and finger and the index finger got a red bump. I try giving him pacifier and teeth smoother... he reject and cry.. what can I do to stop him from biting. I worried he will hurt his finger.

Ya maybe it is itchy and that's why he keep sucking to ease the itch. Find a teether that he likes? I tried through many different brands of teether before I found one which she has some interest in. It was the banana teether. Guess it is more straightforward for them to hold and insert into their mouths like a finger. Those round type teether or with weird shapes all no use to me hahah