White blisters on the tongue can be caused by mouth ulcers, lingual inflammation, mucus cysts and candida stomatitis. 1. Mouth ulcers: lesions caused by mouth ulcers are usually white in color. Mouth ulcers may grow on the tongue and appear as white blisters on the tongue. 2. Tongue inflammation: Tongue inflammation can lead to changes in the morphology of the tongue papillae, which may also lead to white blisters on the tongue as the symptoms vary from one group of people to another. 3. Mucous cyst: It is the most common verrucous lesion of the salivary glands. Cysts caused by rupture of the duct trauma leakage of mucus or obstruction of the ductal system will cause white blisters under the tongue. 4. Candida stomatitis: Candida is usually parasitic in the human body in the oral cavity, intestines, vagina and skin, etc. If there are small spots on the tongue that are white in color like snow, slightly elevated, which can gradually increase in size, they can be clinically manifested as dysphagia, pain, ulcers and other symptoms. Patients with symptoms of white blisters on the tongue should go to the hospital in time to avoid delaying the condition and causing adverse consequences.