You have not mentioned your age because that is relevant as most cases of cancer occur in the elderly population although younger ones are not immune. It might be a pimple, however, in that event you should experience a good degree of pain given the location of the lesion.
I should also mention to you that cancers arising out of moles
can mimic infection because of the necrosis
some areas the cancer undergoes. Therefore, it is always advisable to get this mole along with the underlying lesion removed and a biopsy
done just to be sure that nothing serious is there underneath. Appropriate therapy can then be instituted based on the biopsy report.