The wound is purple after being bitten and is a subcutaneous bruise. You can treat the wound with cold compresses, hot compresses and topical medications. After a period of time, the purple skin will be eliminated on its own, do not need to worry too much. After being bitten, the wound is purple, if there is no skin breakage, just bruising purple, consider more than a small amount of subcutaneous bruising. Disposal measures are: 1. Cold compress: first use iodine volts to disinfect the injury, and then use ice packs and other cold compresses on the injury, 15-20 minutes each time, 3-4 times a day. Cold compresses can shrink the injured capillaries and reduce the formation of bruises. 2. Hot compresses: 48 hours after the injury can be changed to hot compresses, that is, with a hot towel on the wound hot compresses, each 15-20 minutes, 3-4 times a day. It can improve blood circulation and promote healing. 3. Medications: medications that can activate blood circulation and eliminate blood stasis (promote blood circulation and eliminate blood stasis), such as safflower oil and Yunnan Baiyao aerosol, can promote the absorption of blood stasis and promote healing. Medications should be applied under the guidance of a doctor. After the injury, you should pay attention to rest, it is best not to massage at will, so as not to aggravate the injury.