has symptom disease has location perichondritis of auricle UMLS_CUI:C0155389 SNOMEDCT_US_2025_09_01:155210008 ICD9CM:380.00 disease_ontology DOID:222 An otitis externa involving infection of the tissue surrounding the cartilage of the earlobe (pinna), ear canal, or both. It may be caused by injury, burns, insect bites, ear piercing, or a boil on the ear. The common bacterial causative agent is Pseudomonas aeruginosa. Symptoms include redness, pain, fever, swelling of the earlobe and pus accumulation between the cartilage and the layer of connective tissue around it. ICD10CM:H61.0 Perichondritis and chondritis of pinna Perichondritis of pinna otitis externa pain fever pinna