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To what extent does the wound need to be stitched?
Under normal circumstances, it is generally recommended to sew if the length exceeds 0.5 cm and the depth exceeds 0.2 cm. Besides, the wound is in the blood vessel. After the injury, the bleeding is more serious. Even if the wound is small, it needs to be sutured when the bleeding is difficult to stop.

In addition, the joints also need to be stitched, because the joints are constantly moving, and the epidermis in this part is thick and the blood supply is poor, so the wounds in these parts have higher requirements for healing.

Extended data:

Precautions:

1. Go to the hospital regularly to change the dressing and check whether the wound is red, swollen and oozing. Dismantle it in time when necessary to prevent pus from accumulating or oozing.

2, pay attention to in the diet, don't eat spicy food, more vitamins such as protein.

3, the injured area should reduce activities, in order to promote the recovery of the wound.

4, the injured part can't touch water, in order to prevent infection.