What safety hazards should I pay attention to when swimming in summer?

Swimming is a healthy aerobic exercise. People dance with water and fully enjoy the coolness and summer heat. But you should pay attention to safety and hygiene when swimming. In case these small details affect health. 1, Cramp If you are nervous, the water is too cold or you stay in the water for too long, you may get cramps. The preparation activities before launching should be sufficient, and the time in the water should not be too long. Once you get cramps, don't panic. For example, toe cramps, then immediately bend your legs and straighten your toes apart; For calf cramps, first take a deep breath, lie on your back on the water, hold your toes with your hands, and push your calf forward hard to stretch and relax the contracted muscles; When fingers cramp, make a fist, then open it hard, and release it repeatedly. 2, nausea and vomiting nose into dirty water will be like this. Hurry ashore, and then press Zhongwan and Neiguan points with your fingers. If you have a Ren Dan, you can also bring one. To prevent enteritis, you can also eat a few cloves of raw garlic. 3, skin itching rash is mainly caused by skin allergies. Go ashore at once. Take chlorpheniramine or chlorpheniramine, and you'll be fine soon. 4. The cause of headache may be temporary cerebral vasospasm caused by chronic rhinitis, choking water or body cold and insufficient blood supply. At this time, you should go ashore quickly, press Baihui point, temple point and Lieque point on your head with your thumb, then apply a hot towel to your head and drink a cup of hot water to get better. Slightly edited tips; Friends who like swimming must pay attention to safety and do a good job of safety protection before swimming.