Diarrhea is generally referred to as diarrhea, and diarrhea is often accompanied by the loss of water and electrolytes in the body, so dry mouth will occur. If the patient has a more acute onset of diarrhea and watery stools, due to a large amount of water loss in the body, the water content of the body may be reduced, and the blood volume is insufficient, which can cause dehydration, thirst, dry mouth and other symptoms. If the diarrhea is not well controlled, it gradually worsens. It can also lead to symptoms other than thirst, including dry skin mucous membranes and facial flushing. Dehydration can also involve brain cells and mental symptoms such as irritability and in severe cases even coma may occur. In case of diarrhea with dry mouth, it is recommended to seek medical attention, follow the doctor’s instructions for relevant examinations, clarify the cause with the doctor’s help, and carry out targeted treatment or therapy.