Because he suffers from selective mutism, it's difficult for him to speak.

He always carries something sweet with him because of his hypoglycemia.

My friend is troubled by alopecia areata.

She suffers every month because of dysmenorrhea.

My dog recently contracted strongylosis.

His daughter was diagnosed with phenylketonuria.

Hypervitaminosis occurs when the intake of vitamins is too high.

He has prosopagnosia, which makes it very difficult to remember faces.

He explained in detail about the structure of the sphenoid bone.

He slipped and hit his coccyx.