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
it is flat and it just feels funny it doesnt hurt just concered.