Puppy with a skin lump

This certainly can be an ingrown hair or whisker. Is it inflamed, or does it seem to bother him at all? I would massage the area and apply warm compresses to try and relieve any pressure within the hair follicles. This will allow any discharge (caused by the inflammation of the skin) if it is present to come out of the tissues, and help break up any other foreign body that may be in there. If the "lump" opens and drains, plain hydrogen peroxide can be used to naturally disinfect the area. Let me know if there is any response to the heat and massage.