{ also I have a red spot on my arm for a long time
it is flat and it just feels funny it doesnt hurt just concered.
interested if the lesion you refer to is scaling,or other characteristics,changed in appearence,first started out size ect..need more info!
On my left arm I have a small bump that looks like a pimple but very hard it seems to have gotten bigger but it doesn't hurt me If I touch it just concerns me that it could be cancerous. I do have a lot of moles but this looks nothing like a mole and has been on my arm going on now 3 or so weeks.
Ellen:
Melanomas rarely affect the face, and when they do, they don't look anything like what you describe.
On the other hand, if you have a painful red mark for months on your forehead, it may be a less serious form of skin cancer, like a basal or squamous cell. The only way to tell is a biopsy, which is a very minor affair. That's the only way you'll know whether it needs surgical removal for cure, or perhaps some medical treatment. You owe it you your face and yourself to find out.
Good luck.
Dr. R