question: Large lump on left side of forehead / hairline noticed this morning. Would say it is about 5 inches in length and 3 inched in width. Have noticed 5 to 6 pimples on hairline a couple days prior to this. Not sure if this is was caused by something irritating my skin. I do not have allergies or alergic reactions to anything that I know of, however 2 years ago I started have allergies around this time of year which may or may not be relevant.