I have an allergy to paint fumes i have had a headache for a week now how can i get rid of this headache?

Tylenol (acetaminophen) or Ibuprofen: Reducing further exposure paint fumes will help to relieve the headache. Hopefully you are not a professional painter. Usual measures to relieve headache and exposure to fresh air will help to get a relief. The chemical particles binds to your receptors in the nose and triggers headache. It is not necessarily due to allergies; it could be a irritant reaction; the best way is to reduce exposure.