After bleeding from the arm leads to subcutaneous stasis, first, it is necessary to use cotton swabs or cotton balls to press the local wound for a longer period of time, 10-15 minutes is recommended to ensure that the bleeding inside has been completely prohibited before relaxing. Secondly, some hot compresses can be used to promote the local stasis of blood to subside, such as hot towels, warm water bags or salt bags to warm up. In addition, you can also use some physical therapy methods, such as infrared lamp to irradiate or use microwave therapy, are able to promote local blood circulation, accelerate the local bruising and swelling subsidence. In addition, you can also use some potato chips to apply topically, which can also get the effect of reducing swelling and dispersing stasis.