Hello and welcome to Healthcare Magic. Thanks for your query.
can result in a wide variety of medical problems and symptoms. Nicotine
is a cerebral vasoconstrictor in the brain (i.e.) it decreases blood flow to the brain. So, it is quite possible that your symptoms of pressure-like sensation over your head is related to smoking.
Since you have been unsuccessful after several attempts to quit, I would suggest that you seek professional help for the same. There are effective de-addiction treatments - in the form of medication and counselling
which can help you overcome this habit.
Wish you all the best.
Dr. Jonas Sundarakumar