What is a severe case of alopecia areata that results in complete balding of the head called?

Alopecia totalis is characterized by the complete loss of hair on the scalp. This condition presents as a more significant form of alopecia areata, which typically leads to patchy hair loss. While alopecia areata may only cause random bald spots, alopecia totalis involves the entire head, resulting in a completely bald scalp. Understanding this distinction is crucial when discussing various forms of alopecia and their impact on individuals.

The other options describe different types of hair loss: alopecia areata involves localized patches of hair loss; alopecia universalis refers to total hair loss across the entire body, including eyebrows and eyelashes; and alopecia diffusa indicates a more generalized thinning of hair rather than complete baldness. Each type has specific characteristics and implications, making it important to use the correct terminology when diagnosing and discussing hair loss conditions.