Is it normal to have a headache 2 weeks straight after Botox on forehead only?

Thank you for your question alvt88. I understand your concern. Botox is a purified protein used to address wrinkles associated with facial expression. When injected into the skin Botox will relax the muscles and smoothen out the overlying wrinkles. The most common areas of treatment are in the upper face. These include the horizontal lines seen on the upper forehead when one raises the brows, the vertical lines seen between the brows when one frowns (frown lines), and the crow's feet seen around the eyes when one smiles.

A headache from Botox is possible but a persistent headache lasting two weeks from Botox would be highly unusual.  I would consult a neurologist to evaluate your headaches.  Please keep us posted.  Best, Dr. Green