Hello, greetings. Thanks for posting your query, You seem to be suffering from a condition called as migraine where a person experiences headache on one side of the head accompanied with nausea, vomiting, blurred vision, flashes of light in front of eye, sensitivity to light, touch, smell, taste and various other symptoms. Migraine is caused by various environmental and genetic factors. Prevention of migraine can be done by avoiding too noisy surroundings, reducing the levels of stress. Medications belonging to a class of drugs called beta blockers do help. Tricyclic antidepressants may also help. Anti vomiting drugs help during an acute attack. Please visit your local health physician for a prescription.