Don't worry, it's only been a week, 1 month is about the same. Surgery to cut off a piece should be infected. If the inside is stitched well and there is no scar, you can't see it, but it is inevitable to leave a small scar. In terms of diet, please refer to the dietary precautions for postoperative and toxic ulcers. Be careful not to eat irritating and prone foods, such as mushrooms and beef, and do not exercise vigorously for one month.

Seeing your photos, I feel that it is healing well. You are in such a hurry to play ball, it seems that it should be painless. The location of the operation is on the scapula. If you play badminton, you must exercise your shoulders, but not too violently. Your wound should heal. At most, you should leave a shallow scar. The longer it takes, the less obvious it is. Don't worry, hehe.