You can eat onions with wounds. Eating onions will not affect the wound, nor will it cause bleeding, inflammation or infection, and will not affect the wound healing. After the wound is closed, you should be careful not to touch the water, because after touching the water, it may lead to inflammation of the wound and bacterial infection. It usually takes 2-3 days to change the medication. When changing the medication, you should carefully check the healing of the wound, such as whether there is redness, swelling, hard nodules, exudate, pus and other phenomena. If the wound is all right, disinfect it twice with iodophor and cover it with a dressing. If the wound is painful in the process of healing, or even has throbbing pain, it means that the wound is infected and there is pus inside, so you need to remove the sutures on the surface of the wound, drain the pus out, disinfect with iodophor, then fill with gauze to drain and strengthen the dressing change.