Painful touching behind the right ear may be associated with diseases such as lymphadenitis behind the ear, sebaceous cyst behind the ear, and folliculitis. 1. Post-auricular lymphadenitis: Infection of the external ear canal, middle ear or inflammation of the head and neck can lead to inflammation of the lymph nodes behind the ear and neck, resulting in swelling and pain in the ear, and obvious pain when touching the back of the right ear. 2. Post-auricular sebaceous cyst with infection: When sebaceous cyst with infection occurs at the back of the right ear, it can lead to localized pain, skin ulceration, pus and other symptoms. This can lead to pain when pressing on the back of the right ear. 3. Folliculitis: due to the decline in resistance, staphylococcus infection can easily lead to folliculitis. At this time, some bumps may appear behind the right ear. Localized symptoms of redness, swelling and fever will appear, which will also cause pain behind the right ear. Pain behind the right ear is felt, it is recommended to go to the hospital dermatology or otorhinolaryngology, to clarify the cause of the disease, so as to facilitate the cause and symptomatic treatment.