Diaphragmatic palsy is a paralytic rise of the diaphragm on one or both sides due to damage to the phrenic nerve and blockage of nerve impulses, resulting in impaired movement. There are many causes of the disease. The following highlights the preventive measures for diaphragmatic palsy. 1, Avoid outdoor activities in hot weather. 2, middle-aged and elderly people should avoid excessive craving for cold. Most of the blood vessels of the elderly have hardened, and sudden cold and hot temperatures make them prone to accidents. Therefore, the use of air conditioning when the temperature difference between indoor and outdoor to not more than 8 ℃ is appropriate, cold drinks should not drink more. 3, drink more water is the most simple and effective way to prevent the increase in blood viscosity and prevent vascular embolism. Blood viscosity is prone to thrombosis and cause stroke, angina and other diseases. So do not thirsty to drink water, in order to keep the urine clear, bowel movements smooth. 4. Quit smoking and alcohol. Prevent excessive blood viscosity to ensure a good blood supply and oxygen supply to the body. 5, frequent testing of blood pressure and blood sugar. Prevention of diaphragmatic palsy should first pay attention to hypertension, hyperlipidemia and other conditions that can easily trigger a stroke, rationalize summer life, pay attention to the combination of work and rest, eat more food that can soften blood vessels and lower blood lipids, and use antihypertensive drugs and lipid-lowering drugs under the guidance of a doctor. 6, for the elderly with diaphragm paralysis, once the headache, dizziness, limb weakness, hemiplegia, frequent yawning and other discomfort, do not take it lightly, should be the first time to send the elderly to the hospital for treatment. 7, to ensure adequate sleep, strengthen physical exercise, improve the ability to resist disease and adaptability. Those with high blood pressure and blood lipids should maintain a light diet, balanced nutrition, eat more food containing coarse fiber, more fruits and vegetables, and wear breathable, heat dissipating cotton clothes.