How long does a cold compress last?

Cold compress after foot sprain swelling is mainly to promote blood vessel contraction and relieve tissue pain and swelling symptoms. It usually takes about 24 hours to apply cold compress to swollen parts, and after 24 hours, it can be changed from cold compress to hot compress. At the same time, it is also necessary to follow the doctor's advice to take drugs for activating blood circulation and removing blood stasis.