Bleeding Scalp Mole - get a biopsy
It is always advised when a mole changes in size, color, shape, or bleeds to follow up with a trained plastic surgeon, dermatologist, or ENT specialist if above the collar bones as is in your case. A biopsy is often suggested as it is the surest way to know what you are dealing with and if other care is required.
I recommend consultation with a board certified dermatologist who can evaluate the mole. A bleeding mole is an indication for removal. Any mole that is removed should be sent for a pathology interpretation to confirm the mole is benign. Please follow up regarding your bleeding mole.