Summer Heat
Summer heat is one of the yang external pathogenic energies. When summer heat attacks the body, it will give rise to such symptoms as headache, fever, thirst, mental depression, excessive perspiration, and forceful and rapid pulse. Summer heat can also cause great harm to body fluids, which in turn leads to such symptoms as fatigue, weak limbs, and dry mouth. In certain regions, when a great deal of dampness or humidity accompanies a prolonged summer, summer heat can attack the body along with dampness to cause such symptoms as congested chest, nausea, vomiting, and diarrhea.