He underwent surgery for appendicitis.

Due to otitis, he found it difficult to listen to music.

My dermatitis was treated by a dermatologist.

He was taken to the hospital because of peritonitis.

My son went to the hospital because of otitis media.

My aphthous ulcer hurts so much that I can't eat.

He was diagnosed with iritis.

My eyes have become infected with conjunctivitis.

He was hospitalized due to pleurisy.

My mother is going to the ophthalmologist because of keratitis.