I feel tight after sewing the needle because the meat in the tiger's mouth is tied tightly by the suture. When changing the dressing, the needle is hard but not painful, which means that your wound has begun to heal. It is normal for your thumb to feel numb, which means that your nerve is not injured.

Just take care of it, and be careful not to get wet, because the wound heals slowly and it is easy to leave scars.