Dry tongue may have: 1. Damage to salivary glands due to injury or infection, which makes saliva secretion decrease and causes dry mouth symptoms. Mostly seen in patients with Schegren’s syndrome, this type of patients are mostly seen in women aged 40-50. Due to the immune disorder, the salivary glands are damaged, resulting in extreme dryness of the oral mucosa, a burning sensation in the mouth, dryness and numbness of the tongue, as well as varying degrees of taste disorders. 2, when the body is on fire, it is also easy to cause a dry tongue. 3, poor dietary habits, like to eat spicy and stimulating food, or due to partial and picky eating, resulting in vitamin and trace element deficiencies in the body, can also cause 4, other systemic diseases can also cause dry tongue, mainly in patients with diabetes and hyperthyroidism.