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Trichotillomania (TTM), also known as hair-pulling disorder or compulsive hair pulling, is a mental disorder characterized by a long-term urge that results in the pulling out of one's own hair. [2] [4] A brief positive feeling may occur as hair is removed. [5] Efforts to stop pulling hair typically fail.
Stress can cause two main types of hair loss: telogen effluvium and trichotillomania. Telogen effluvium causes hair follicles to enter a resting phase due to your body’s stress hormone levels ...
The external root sheath appears empty with cuboid cells when stained with H&E stain. The internal root sheath is composed of three layers, Henle's layer, Huxley's layer, and an internal cuticle that is continuous with the outermost layer of the hair fiber. The bulge is located in the outer root sheath at the insertion point of the arrector ...
Once the hair has been pulled out, persons with trichophagia might rub the hair against their lips, roll the hairs around and inspect them, bite off and swallow the bulb of the hair, or ingest the entire hair shaft as well. [9] Typically, ingested hair remains asymptomatic and is not harmful.
"During this phase, hair growth stops, and the outer root sheath shrinks and attaches to the root of the hair," says Dr. Kinler. "This detachment is a natural process as the hair prepares to enter ...
Alopecia occurs for various reasons, including genetics, autoimmune disorders where the immune system attacks hair follicles, hormonal changes, medical treatments like chemotherapy, or other factors.
Pili multigemini, also known as "compound hairs," [2] is a malformation characterized by the presence of bifurcated or multiple divided hair matrices and papillae, giving rise to the formation of multiple hair shafts within the individual follicles. [3] [4]
Lupus, an autoimmune condition that can attack many areas of the body, may lead to hair loss by causing inflammation on the scalp and other hair follicles, causing hair, including eyebrows ...