This has probably happened to a lot of 당신 because of taking notes in class.
Have 당신 ever got a little blister 또는 callus because of 글쓰기 too much on your finger? It's normal. All it is is a small callus from the pen applying a bit too much pressure 또는 rubbing for too long against your skin.
Calluses are not dangerous, but they aren't pretty either. All people who practice something with their hands all the time get them. Playing the 기타 또는 even cooking a lot can result in calluses.
So 당신 have some calluses and 당신 want to get rid of them. Fine. Use pens that have a little padding and try not to push down so hard on the pen.
당신 can also do a treatment to get rid of calluses. Put your hands in warm water with 레몬 for 10 분 and let them soak. Then dry them off and apply creams 또는 아몬드 oil to the callus. Use hand cream daily and 당신 will see a difference.
If the callus hurts and does not go away then ask your parents about it. Lol