Thank you for posting your query.
The most likely diagnosis in your case is migraine
in migraine do get aggravated with fasting or hunger, and last for several hours. Associated nausea or vomiting is often present. Dizziness
can also be present with migraine episodes.
Since you are having frequent headaches, you need to start medications to prevent recurrent episodes of headache.
You should consult a neurologist
for the same.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad