Pain at the ear root may be caused by inflammation and infection, allergy, trauma, and other reasons, and timely examination and treatment are also required.

1. Inflammation and infection: If the skin around the ear root is not clean, redness and local pain may occur after chronic inflammation and infection. It is recommended to apply erythromycin ointment, dexamethasone ointment, fluocinolone cream, and other topical medications as prescribed by a doctor.

2. Allergy: Pain at the ear root may be due to contact with allergens, which can cause irritation to the skin and nerves, leading to pain. Medications such as loratadine tablets, vitamin C tablets, and ketotifen tablets can be taken orally as prescribed by a doctor.

3. Trauma: Soft tissue injury and pain may occur if the ear root is subjected to violent trauma, and timely skin disinfection and bandaging treatment are required.

In addition to the above common causes, it may also be caused by frostbite or other factors, and treatment should be based on the cause.