Do you know these common sense about swimming?

　　Health care before swimming

　　⑴When swimming, when the skin is in a moist state, due to light reflection, the sun exposure effect will be three times that of dry skin.

　　⑵Exposure to the sun after swimming is harmful to the body. Exposure to the sun for a long time while the water is still dry, skin There will be erythema, blisters, and large areas of skin peeling, accompanied by pinprick-like pain. It can also damage the DNA in skin cells, causing skin cells to mutate and grow out of control, leading to skin cancer.

　　Post-swimming care

　　⑴After swimming, avoid infection and take a bath in time to avoid itchy skin.

　　⑵If water enters the ear, the acidity and alkalinity of the ear oil will be destroyed, affecting the function of the ear oil in preventing bacterial infection. At this time, applying a few drops of vinegar and alcohol after swimming is a very effective method.

　　⑶ After swimming, wash your eyes promptly with 1-2% saline or apply a few drops of eye drops to prevent infection and adverse irritation.

　　When swimming, the water temperature is generally lower than body temperature, and you may get sick. cold . Shower before entering the water to allow your body to adapt to the water temperature. If you don't get enough sleep, are too tired, or are emotional, swimming is not suitable.

　　There are bound to be some troubles when entering the water. Here are some problems and solutions.

　　cramp

　　Cramps may occur if you are stressed, if the water is too cold, or if you stay in the water for too long. Preparatory activities before entering the water should be sufficient, and the time in the water should not be too long.

　　If cramps occur, don't panic. For example, if you have a toe cramp, immediately bend your leg and pull your toes apart and straighten them; if your calf has a cramp, take a deep breath, lie on your back on the water, hold your toes with your hands, and push your calf forward to stretch and relax the contracted muscles.