Earlobe rotten is the vast majority of the earlobe basal attachment sites, that is, behind the earlobe front and back and the junction of the skin moving folds. Usually seen in the following situations: First, localized skin eczema, mostly due to uncleanliness, moisture, metamorphosis. Localized sebaceous gland secretion, infection. Acute folliculitis, also commonly known as “boils”, the surface of the infection caused by rupture. Frostbite, especially when exposed to cold environments. Post-traumatic injury, often caused by inadvertent twisting of the ear, pulling and other actions. Sixth, local fungal infection, especially patients with a history of gray nails or tinea pedis, not pay attention to the cross-infection caused by hygiene, need to be through the secretion or scab smear culture to be able to confirm the diagnosis. Skin cancer, surface ulceration, long lasting, also need to be diagnosed through pathological biopsy.