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The scalp is the area of the head where head hair grows. [1] It is made up of skin, layers of connective and fibrous tissues, and the membrane of the skull. Anatomically, the scalp is part of the epicranium, a collection of structures covering the cranium. The scalp is bordered by the face at the front, and by the neck at the sides
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
In chemistry, this is the opposite of oxidation and can mean the removal of oxygen or, in this case, the addition of hydrogen, which by breaking the bonds of the keratin in the hair, allowed waving to take place more easily.
Causes of hair loss. This could be a range of things from stress to too much daily manipulation. Genetics (Androgenetic Alopecia): "Genetic predisposition is a common cause of hair loss, with ...
Scalp psoriasis is an inflammatory and chronic autoimmune disease and is a common cause of scalp scabs and discolored patches of skin on and around the scalp. It can also affect other parts of the ...
Specifically, scalp fungal infections are often caused by fungi in the microsporum and trichophyton genera. Scalp fungus can cause a variety of symptoms, including: Dry, scaly skin. Redness ...
It is commonly stated that hair grows about 1 cm per month on average; however reality is more complex, since not all hair grows at once. Scalp hair was reported to grow between 0.6 cm and 3.36 cm per month. The growth rate of scalp hair somewhat depends on age (hair tends to grow more slowly with age), sex, and ethnicity. [15]
A dry scalp is caused by a lack of moisture and may be due to dry weather conditions, washing hair too frequently, product buildup, or using harsh shampoos or other hair products, explains Dr. Gratch.