You should certainly see a board-ceritified dermatologist or plastic surgeon who is experienced in dealing with lipomas and keloids. Any cutting into the skin can result in a keloid.
Ideally, the smallest incision possible should be used to remove the lipoma, how large it will be depends on...
No work for at least 2 days if you do light work. If your job involves physical work then no work for one week at least.
No exercise for one week. You can walk after that.
No weight lifting in gym or heavy exercise for 3 weeks.
You cannot be sure that it is a lipoma. It could be an infected sebaceous cyst which are more common in the scalp than lipomas.
You can to to a general surgeon, a plastic surgeon, an otolaryngologist, a facial plastic surgeon.
First you need to stop touching it without washing hands, start oral...