Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
Your sinus infection
and migraine headache
may not be related to the dent in your head. You certainly need to do a CT scan of the head to identify the cause of the dent. But you also need treatment for migraine and sinus infection. For migraine good drugs are headset, migranil, etc. For sinus infection you need to take a antibiotic when there is a sinusitis
and in other times you need to take cetrizine
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.