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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
Defatting is the chemical dissolving of dermal lipids, from the skin, on contact with defatting agents. This can result in water loss from the affected area and cause the whitening and drying of the skin which may result in cracking , secondary infection and chemical irritant contact dermatitis .
The exact cause of erosive pustular dermatitis of the scalp is unknown. Risk factors include actinic damage, epidermal atrophy, topical drugs and agent, surgery, and infections. Trauma and tissue injury are other potential triggers. A skin biopsy can be used to help rule out potential differential diagnoses but histopathology is unspecific.
[8] [12] In addition to flaky skin, seborrhoeic dermatitis can have areas of red, inflamed, and itchy skin that coincide with the area of skin flaking, but not all individuals have this symptom. [8] Seborrhoeic dermatitis of the scalp can appear similarly to dandruff. [11] When the scalp is affected, there can be associated temporary hair loss ...
Chemical hair analysis is used for the detection of many therapeutic drugs and recreational drugs, including cocaine, heroin, benzodiazepines and amphetamines. [3] [4] Hair analysis is less invasive than a blood test, if not quite as universally applicable. In this context, it has been reliably used to determine compliance with therapeutic drug ...
Poison ivy. What it looks like: Poison ivy is a type of allergic contact dermatitis that is caused by the oil (urushiol oil) in the poison ivy plant, explains Karan Lal, D.O., M.S., F.A.A.D ...
The skin weighs an average of 4 kg (8.8 lb), covers an area of about 2 m 2 (22 sq ft), and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are glabrous skin, the nonhairy skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [16]
According to board-certified dermatologist Dr. Nazanin Saedi, “A bleach burn is a chemical burn on your scalp caused by hair bleach. Typically, a bleach burn is a first-degree burn that affects ...