If you have a hard bump next to your sideburns, it could be a localized inflammation of the lymph nodes in front of your ear, or it could be a swelling of the skin or subcutaneous tissue, such as folliculitis or sebaceous adenoma, which is often referred to as a powder tumor. If you want to confirm the diagnosis, you can go to the hospital to check the local ultrasound, which can basically confirm the diagnosis. If it is a local lymph node enlargement, it may be caused by otitis media or nasopharyngeal inflammation, which can be eliminated by treating the original disease. If it is localized folliculitis, topical anti-inflammatory and pain-relieving ointment will slowly relieve the symptoms. If it is a sebaceous adenoma, it is difficult to eliminate it immediately with topical ointment, and surgical removal is necessary for complete treatment.