Sleeping at night like a pinprick pain in the mouth may be stomatitis, lingual inflammation, oral ulcers and other diseases. 1. stomatitis: stomatitis patients are mainly oral mucosa redness, edema, ulcers and other symptoms, patients can have burning, itching, tingling sensation, so sleep at night in the mouth like a pinprick pain may be stomatitis caused. 2. Tongue inflammation: patients with tongue inflammation can be manifested as erythema-like lesions on the anterior part of the tongue, often accompanied by numbness, burning sensation, usually in the time of eating the pain will be aggravated. 3. Mouth ulcers: mouth ulcers may be associated with infection, endocrine changes, food, stress and other factors, the patient is mainly in the oral mucosa with ulcers, accompanied by burning pain, in cold, hot and other stimuli can aggravate the pain. The mouth may also have mouth ulcers at night when you sleep. Sleeping at night like a pinprick pain in the mouth there are other reasons, it is recommended that patients seek medical attention in a timely manner, by the doctor to clarify the cause, targeted treatment, to avoid aggravation of symptoms affecting daily life.