Hello thanks for asking Headache occurring on one side of head associated with pain in eyes or pain on one side of face could occur due to migraine or due to chronic tension type headache (CTTH). Usually migraine is throbbing or pulsatile type of headache that get aggravated with noise, excess mental tension, or bright lights. The headache usually occur on one side of head. Tension headache can also present with heaviness of head on one side and triggered by excess mental stress. I would advise you to consult a neuropsychiatrist for expert opinion. Medicines like Amitryptiline, Nortryptiline are very useful in headache. For symptomatic relief medicines like Paracetamol, Ibuprofen have good results. Propranolol have also excellent results in prophylaxis against migraine. Avoid excess tea, coffee or smoking to decrease headache. Relaxation exercises will also help in early recovery. Thanks