Swelling of the right auricle is mostly caused by traumatic bruising, auricular pseudocyst and auricular suppurative perichondritis. 1. Traumatic bruising: If the right ear is traumatized, bruising under the skin may occur, which will lead to the swelling of the right auricle of the patient. 2. Pseudocyst of the auricle: If the position of the auricle is subjected to mechanical injury, or often rubbed, rubbing and other stimuli, it may lead to the emergence of aseptic exudate in the cartilaginous membrane space, resulting in the enlargement of the right auricle. 3. Auricular purulent chondritis: Auricular infection caused by purulent inflammation of the auricular cartilage membrane may also lead to swelling of the right auricle. The swelling of the right auricle may also be caused by frostbite, mosquito bites or eczema, etc. You should go to the hospital to find out the cause of the swelling to avoid delayed treatment.