The causes of dry mouth and dry eyes are as follows: 1, environmental factors: such as a dry living environment, oral as well as eye moisture evaporation increases, thus appearing dry mouth and dry eyes, you can use humidifiers to improve the wetness of the environment to correct these symptoms; 2, physiological factors: mostly seen in the elderly population, due to the lacrimal gland, lid gland secretion function decreases as well as the oral salivary gland secretion function decreases, and dry mouth If patients have dry eyes and dry eyes, they can give relevant symptomatic treatment, such as using artificial tears and artificial saliva for treatment; 3, pathological factors: such as rheumatology dry syndrome, they can have dry eyes and dry mouth. If patients have dry eyes and dry mouth, they should go to the hospital for examination as soon as possible to clarify the specific causes and carry out relevant treatment.