The right eyelid has been slightly twitching is usually considered to be caused by mental tension or excessive fatigue, but also may be the facial muscle spasm and other reasons. 1. Mental tension: Mental tension can lead to abnormal relaxation and contraction of orbicularis oculi muscle fibers, resulting in a slight spasm of the right eyelid. Patients are advised to maintain a good mental state in general, which helps to improve the symptoms and usually relieves them within a few hours. 2. Excessive fatigue: Patients who are overworked and use their eyes for a long period of time may experience a slight spasm of the right eyelid. Patients are advised to rest more to ensure enough sleep and relax their eyes properly. Eyelid twitching symptoms usually improve the next day. 3. Facial muscle spasm: characterized by paroxysmal involuntary twitching of the facial muscles on one side of the face, typical facial muscle spasm symptoms will start from the eyelid and gradually develop downward to involve the facial expression muscles and other muscles, and generally require medical treatment. Patients with mild twitching of the right eyelid can be relieved by rest, appropriate massage, hot compresses and other methods. If it can not be relieved, it is recommended to go to the hospital in time for examination and treatment.