Will you clarify the reason for my forehead rashes during headache?

Hi doctor,

I am suffering from headache for the last 20 years. Initially, I used to take Saridon tablets to get relief from headache and it has given results for some time. After a few years, one of the doctors advised me to do pranayama (breathing exercise) and it has given good results. My frequency of headache has come down drastically once in three months or so. Whenever this headache occurs, some red rashes will appear on my forehead, especially in the center of my forehead and will disappear after two or three days. I could not understand the reason for the rashes. When I touch the rash, I do feel some pain. Recently, I consulted a neurologist and he said that it is migraine headache and the tablet Dolo 650 has to be used whenever headache starts. If headache appears twice in a month, then I should use Sibelium 10 mg (Flunarizine). He also said that this headache will be there till the age of 55 years and I am 43 now. My mother also gets headache for the last 40 years. Please clarify the reason my rashes during headache. Also, can I Dolo 650 for headache?