Final answer:
Abnormal lumps and lesions on the external ear can include conditions such as hot tub folliculitis, otitis externa, and osteomyelitis. These can cause symptoms like itching, redness, pain, and swelling, and are often caused by bacteria such as Pseudomonas aeruginosa. Prompt medical attention is important for treatment.
Step-by-step explanation:
The external ear includes structures on the lateral surface of the head, such as the auricle (pinna) and the ear canal extending to the tympanic membrane (eardrum). Abnormal lumps and lesions found on the external ear can include a variety of conditions, some of which are:
- Hot tub folliculitis: This presents as an itchy red rash and is typically caused by Pseudomonas aeruginosa, a bacterium that thrives in warm, wet environments like hot tubs. Folliculitis can afflict individuals who use pools and hot tubs frequently.
- Otitis externa (swimmer's ear): This is an infection of the external ear canal that can cause itching, redness, discomfort, and can progress to fever, pain, and swelling. It is most commonly caused by Pseudomonas aeruginosa.
- Osteomyelitis: This refers to inflammation of bone tissue, which can affect the temporal bone adjacent to the external acoustic meatus (ear canal).
Other symptoms associated with these conditions can include pain, unusual bleeding or discharge, erythema (redness), severe peeling of the skin, and in more severe cases, chronic inflammation may lead to erosion of the inner ear bones and mucus buildup. It is important to recognize these symptoms and seek medical attention if they occur.