hair loss
Introduction
Introduction Hair loss can be divided into two basic types: permanent hair loss due to damage to the hair follicle, and temporary hair loss due to short-term damage to the hair follicle. Permanent hair loss is a common male baldness. In some European countries, men have a bald rate of 40%. The hair loss process of permanent hair loss (ie, male pattern hair loss) is gradually produced. At the beginning, the hair on the forehead of the head is obviously retracted, and the hair at the top of the head is scarce; then it develops gradually, and finally it develops to the back of the head, with a thin strip of hair on both sides of the head.
Cause
Cause
1 local skin lesions: such as seborrheic dermatitis, leprosy, syphilis, jaundice, etc., hair loss is often irregular.
2 neurotrophic disorders: such as alopecia areata, is a sudden localized plaque-like baldness, sometimes accompanied by eyebrows, beards, etc., often regenerated.
3 endocrine diseases: such as hypothyroidism, hypofunction of the anterior pituitary, hypogonadism and so on.
4 some febrile diseases: such as typhoid.
5 The effects of certain drugs and radiation: such as cyclophosphamide, etoposide, cisplatin and other anticancer drugs and excessive radiation effects.
6 trauma: such as burns and scars.
7 Age: Hair loss can occur in the elderly.
Examine
an examination
Related inspection
Hair hair mineral inspection
There are many types of hair loss, and clinically common ones are:
1. Congenital alopecia: Less common, the patient is born with no hair at all or part of the body, usually combined with other congenital anomalies, such as nails, teeth, bone developmental defects or deformities, may be caused by chromosomal abnormalities.
2. Androgenetic alopecia: seborrheic alopecia, related to heredity, mostly occurs in the 20 to 30 years old, the hair is gradually sparse and shedding, males start from the sides of the forehead, gradually extending to the top of the head; or from the top of the head Start and then expand to the forehead. Hair becomes slim and scarce. Due to the strong secretion of sebum, some people's hair is greasy, and the hair is dry and dull after long-term development. Female hair loss is generally mild, mostly hair sparse at the top of the head.
3. Alopecia areata: a sudden onset of localized hair loss, normal skin, no inflammation, smooth surface, plaque-like hair loss, which can last for several months or years, most of which can be regenerated. The detached plaque can be 1-2, and more than 10 plaques. In severe cases, the entire head hair quickly falls off, which is called total baldness. There are also very few patients, except for hair loss, other parts of the hair such as eyebrows, eyelashes, beards, bristles, pubic hair, etc., and even the body's bristles are shed, called alopecia.
Diagnosis
Differential diagnosis
Hair loss needs to be differentiated from different types of hair loss.
1, seborrheic alopecia: often appear in young and middle-aged people, the performance of the scalp has a thick oily secretion, the head is bright, sparse and thin, or dry hair, dandruff, dull, sparse and slender.
2, pathological hair loss: mainly due to virus, bacteria, high fever on the hair cells, inhibiting the normal division of hair cells, so that hair follicles in a state of shock leading to hair loss, such as acute infectious diseases, long-term use of certain drugs.
3, chemical hair loss: harmful chemical substances on the scalp tissue, hair follicle cells damage caused by hair loss
4, physical hair loss: air pollutants block hair follicles, harmful radiation and other causes of hair loss.
5, nutritional hair loss: digestive dysfunction caused by malnutrition leading to hair loss
6, obesity hair loss: a large number of saturated fatty acids in the body after the metabolism of waste, clogging hair follicles leading to hair loss
7, hereditary hair loss: hair loss is also hereditary, generally male dominant sexual inheritance, female negative inheritance.
