Agreed, frostbite. I have seen it take 5-7 days for the extent of frostbite to show up. Frostbitten tissue should never be massaged or rubbed due to that causing more damage. I live frostbitten combs alone, no sprays, creams, or ointments applied which could also freeze causing more freezing. It takes weeks to heal, but most combs may have some rounded off tips and may become smaller.