Diving is a fairly safe recreational activity. It is a very relaxing recreational activity that does not need a high fitness level. Like other sports, there are some medical problems associated with diving. The most common are ear squeezes. Because of the difference in pressure between your ear spaces and the atmosphere around you as you go deeper. Sometimes, these squeezes can also affect the inner ear and sinus. These incidents are very rare though. Because of poor buoyancy control and unnoticed obstacles, cut, scrapes and other injuries to the arms and legs are possible, especially for people who are not wearing a wetsuit. Contact with some marine life can also cause itching and swelling. For this reason, you must refrain from touching formations and marine life that they may found under the sea. Always pay attention to your guide’s hand signals. When he’s fingers are curled into a fist, stay away from what he is pointing at or you might end up ascending while itching and scratching.