Female pattern baldness
In female pattern hair loss, hair thins slowly over the whole scalp (known as diffuse thinning). Like male pattern baldness, it can begin any time after puberty, but most women do not experience hair loss until they start to get older. It is much less common for female pattern hair loss to cause complete baldness.
Alopecia areata
Alopecia areata is an autoimmune condition, meaning the body’s defence system attacks healthy tissues. In the case of alopecia areata, this includes the hair follicles. In rare cases, this can eventually lead to alopecia totalis, in which the scalp becomes completely bald. However, it usually remains limited to a few patches and often resolves spontaneously without treatment.
The damage to hair follicles causes hair to fall out and prevents new hair from growing. This disease can affect people of any age or gender, and hair loss can be sudden. Alopecia universalis is a similar condition that causes a complete loss of all scalp and body hair.
Trichotillomania
Trichotillomania (TTM) is a psychological condition that occurs when someone cannot resist the urge to pull out their hair. The hair may be pulled out from the scalp, eyebrows, eyelashes, genital area, beard, or moustache. It usually starts in children aged 10-13 [6].
People with TTM experience increasing tension and an intense urge to pull out their hair. When they do, they feel a sense of relief. It’s not clear what causes TTM, but possible explanations suggest it could be [6]:
- A coping mechanism for anxiety or stress
- Due to hormonal changes during puberty
- A genetic condition
- A chemical imbalance in the brain