Alopecia

Definition

Alopecia is the medical term for hair loss, which can occur on the scalp or other parts of the body. It can result from various factors including genetics, autoimmune conditions, nutritional deficiencies, and stress.

5 Must Know Facts For Your Next Test

1. Nutritional deficiencies, particularly in protein, iron, and certain vitamins (like biotin and vitamin D), can contribute to alopecia.
2. Autoimmune conditions such as alopecia areata cause the immune system to attack hair follicles.
3. Hormonal imbalances, including those related to thyroid function and androgen levels, can lead to hair loss.
4. Certain medications and treatments like chemotherapy are known causes of alopecia.
5. Stress and traumatic events can trigger a condition called telogen effluvium, leading to temporary hair loss.

Review Questions

• What nutritional deficiencies are commonly associated with alopecia?
• How does an autoimmune disorder like alopecia areata affect hair follicles?
• Which medications or treatments are known to cause alopecia?

Related terms

Dermatitis:

A general term for inflammation of the skin often resulting in redness and itchiness.

Biotin:

A B-vitamin important for maintaining healthy skin, hair, eyes, liver, and nervous system.

Telogen Effluvium: A temporary form of hair loss that occurs after stress or a traumatic event causes more hairs than usual to enter the shedding phase.