Bruises are the most common kickboxing injury. Kicking or punching a heavy bag, blocking a kick or taking a hit can all break blood vessels and result in painful bruises. Bruises will generally heal in a few days, and you can take an over-the-counter pain medication such as ibuprofen to help reduce pain and inflammation.
If you bruise very easily, or seem to get bruises more often than other people, you should see a doctor, as this may be an indication of anemia or another underlying condition.
The explosive, powerful kicks found in all styles of kickboxing can put tremendous stress on your knees. Repetitively rotating your knees and supporting your weight on one leg put your knees at risk of injury.
Pay attention to your joints. Prolonged or sharp pain in your knees may be the sign of strained or torn tendons that need evaluation by a medical professional.
Ankle strains and sprains are a common kickboxing injury. Kickboxers often put all their weight on one leg to deliver a kick, and rotation under that pressure can cause joint damage. Ice your ankles following your workout to help reduce inflammation, and do not exercise again until your ankles feel strong and without pain.
Kickboxing can cause back injuries in even the strongest participants. The dynamic twisting associated with kicking and punching can wear down muscles and strain tendons over time, resulting in overuse injuries. In addition, conditioning exercises like crunches can place additional stress on your back.
Mild back pain will usually go away if you give your body appropriate time to recover between workouts. However, if you experience severe pain, or pain that lasts more than a week, you should seek medical attention.
If you only kickbox as an aerobic exercise, you may not even make contact with another person, so your chances of head injury are slim. However, in amateur and professional competition, strikes to the head are an integral part of the sport, and concussions are a real possibility.
If you experience confusion, memory loss or nausea following a blow to the head, you should seek medical attention. If a doctor determines that you have suffered a concussion, avoid competing for at least a few weeks or as long as your doctor recommends. Your risk of concussion increases after a concussion, so you will need to be particularly careful going forward.