It has been four days since I sewed up the wound under my arm. Why does it still hurt? I always feel my arm hurts.

Hello. According to the situation you described. Generally, it is necessary to consider whether there is inflammation in the wound. (Originally, there were many sweat glands under the armpit, and the weather was hot. Sweat a lot)

Suggestion:

For your question. If I hadn't changed the dressing, It is recommended to change gauze. See if the wound is inflamed. If there is inflammation, active anti-inflammatory treatment should be taken. At the same time, dressing should be changed frequently to keep the wound clean and dry. You can put a cushion under your arm. You can fold a mat with a towel and fix it around your neck with a rope or bandage (through your armpit and tied to the opposite side). You'd better hang your upper limbs on your chest. This can avoid swelling of the upper limbs.