Generalized weakness in hot weather can be seen in normal people, but it may also be caused by heat stroke, hypokalemia, etc. You should consult a doctor in time to clarify the cause of the disease and then carry out treatment. 1. Physiological conditions: If you have stayed up late and had poor sleep quality before experiencing generalized weakness in hot weather, it may be caused by insufficient rest, and such people should pay attention to rest and take appropriate physical exercise, and generally do not need special treatment. 2. Heatstroke: If the patient has stayed in high heat, high humidity and impermeable environment before experiencing generalized weakness in hot weather, it should be considered that it is caused by heatstroke, and the patient will also have the symptoms of dizziness, thirst and tinnitus, etc., and he should detach himself from the scene environment in time, and wipe his whole body with a wet towel. 3. Hypokalemia: when it is hot in summer, sweating will take away a lot of potassium ions, and the decrease of serum potassium concentration will cause general weakness, anorexia, nausea, vomiting, etc. This kind of people can consume more bananas, cucumbers and other fruits and vegetables, and can take oral potassium supplements if necessary. All the above medications and treatments should be used under the guidance of a doctor.