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“Folliculitis is an inflammatory process of the hair follicles that usually occurs as a result of microorganisms within the hair follicle,” says Dr. LoGerfo. “An individual can develop ...
There are many structures that make up the hair follicle. Anatomically, the triad of hair follicle, sebaceous gland and arrector pili muscle make up the pilosebaceous unit. [1] A hair follicle consists of : The papilla is a large structure at the base of the hair follicle. [4] The papilla is made up mainly of connective tissue and a capillary ...
Folliculitis starts with the introduction of a skin pathogen to a hair follicle. Hair follicles can also be damaged by friction from clothing, an insect bite, [2] blockage of the follicle, shaving, or braids that are very tight and close to the scalp. The damaged follicles are then infected by Staphylococcus spp. Folliculitis can affect people ...
A boil, also called a furuncle, is a deep folliculitis, which is an infection of the hair follicle. It is most commonly caused by infection by the bacterium Staphylococcus aureus, resulting in a painful swollen area on the skin caused by an accumulation of pus and dead tissue. [1] Boils are therefore basically pus-filled nodules. [2]
Pain or tenderness: The affected areas might be sore or painful to touch. Redness and swelling: The skin around the follicles can become red and swollen. Crusting and flaking: The scalp may ...
Each arrector pili is composed of a bundle of smooth muscle fibres which attach to several follicles (a follicular unit). [4] Each is innervated by the sympathetic division of the autonomic nervous system. [4] The muscle attaches to the follicular stem cell niche in the follicular bulge, [3] [4] [5] splitting at their deep end to encircle the ...
The hair follicles are innervated by at least 5 classes of low threshold mechanical receptors. [ 1 ] They are mechanoreceptors conveying touch sensation with cell bodies located inside of either dorsal root ganglia or trigeminal root ganglia . [ 1 ]
Goose bumps are created when tiny muscles at the base of each hair, known as arrector pili muscles, contract and pull the hair straight up. The reflex is started by the sympathetic nervous system, which is responsible for many fight-or-flight responses. The muscle cells connected to the hair follicle have been visualized by actin ...