Chinese medicine believes that the symptoms of thick white tongue coating, weakness and drowsiness are caused by dampness. Either because of external infection, or because the spleen is not healthy, the body of dampness, blocking the whole body qi, can lead to weakness; dampness on the mask, the mind is not clear, there will be lethargy; dampness is prevalent, the tongue will be manifested in the tongue coating white. It is important to note that dampness is only a very generalized cause. In fact, if the external infection of dampness, then dampness can be mixed with summer or cold when attacking the body. And after attacking the body, dampness can also lead to lesions in different parts of the body, or dampness obstructs the intestines, or dampness traps the spleen and stomach (dampness stays in the spleen and stomach), or causes water metabolism disorders. And all of these conditions are likely to have the symptoms mentioned above. In addition, if you feel dampness and epidemiological poisonous evil, you may also have symptoms such as weakness and lethargy. If the above symptoms appear in the body, you should go to the hospital in time to get a clear diagnosis, and do not take it lightly so as not to delay the condition.