Sports injuries often occur in the process of training. They may be caused by accidents, bad training practices or improper use of the sports gear. Not warming up or stretching enough can also cause injuries. Among the most common sports injuries are: sprains and strains, knee injuries, swollen muscles, fractures, dislocations. The most common treatment usually begins with advice for good rest, ice and other compressions, which will kill the pain, reduce the swelling, and speed the healing process. Other treatments include pain relievers, rehabilitation, and in some cases surgery.