Twitching and spasms below the eye and on the face for several years may be due to eyelid myokymia, hemifacial spasm, stress, fatigue, nerve irritation, caffeine excess, or rarely a neurological condition. Treatment depends on the exact cause. Doctors may sometimes prescribe medicines such as Clonazepam or muscle relaxant therapy in selected patients, while persistent hemifacial spasm may require Botox injections or neurological evaluation. Reduce stress, get adequate sleep, limit caffeine, and correct deficiencies such as magnesium or vitamin B12 if present. Since your symptoms have lasted 5 years, please consult a neurologist or ophthalmologist for proper examination, and you may need tests such as MRI or nerve evaluation if advised.