Small red dots on the tongue is considered to be caused by bad dietary habits, but also may be the emergence of mouth ulcers, papillitis and other diseases. 1. bad eating habits, if you often eat spicy and greasy food or too hard food, may lead to tongue irritation, so there will be small red dots on the tongue symptoms. 2. Oral ulcers, patients with oral ulcers oral mucosal tissue lesions may lead to the symptoms of small red dots on the tongue. 3. papillitis of the tongue, patients with papillitis of the tongue due to inflammatory changes in the papilla of the tongue, may appear on the tongue with small red dots, tongue odor tingling and other symptoms. Usually need to pay attention to maintain a light diet, more rest.