北京燕都头癣医院（Beijing Yandu capitis hospital）Overview of tinea capitisTinea capitis is superficial fungal infection of the scalp and hair, according to the pathogeny and clinical manifestations can be divided into yellow, white and black dot ringworm three. It is contagious in children and easily transmitted among nurseries, kindergartens, primary schools and families. It is mainly transmitted through contaminated hair cutting tools, and can also be infected by contact with ringworm cats, dogs and other livestock.The etiology of tinea capitis(1) cause of diseaseTinea capitis is fungal infection of the scalp and hair caused by the disease, suffering from tinea capitis, there are a lot of gray scales or large yellow crust on the scalp, may also cause the hair to break or fall off, serious uneven hair even There is not much left. that people say, Lali head .The occurrence of tinea capitis is mainly transmitted by contact with the animal disease or patients with tinea capitis and, from the nature of the infection is extremely rare and normal people and patients of tinea capitis often in close contact, especially the children play together, head to contact, it is easy to be infected with the disease, and animal contact after illness this, all belong to the direct infection, if patients with tinea capitis hat, scarf, pillow, comb or hair clippers, scissors, etc. can also be transmitted, this is called indirect infection, visible tinea capitis is infectious, tinea capitis past epidemic in China is very wide, the hospital can often see patients with tinea capitis.However, fungal infection does not necessarily cause tinea capitis, this and resistance to fungi are closely related, most adult fungi resistance is strong, and the child is weak, so prevalent in children with tinea capitis.(two) pathogenesisThe skin of the host suitable environment is very important for the development of dermatophytosis, except for trauma, increase skin moisture impregnation is also suitable for the growth of ringworm fungi, impermeable clothing can increase local skin temperature and humidity, the cuticle interference barrier function, dermatophytes invade the skin, but also through the development of several stage, including incubation period, increase in anti infection and degradation during.The symptoms of tinea capitisThe symptoms of tinea capitis:Lymphadenopathy, pustules, herpes, dermatitis, papules, bacterial infections, permanent baldness, fungal infectionPorrigo from childhood onset, can be extended to adults without self-healing, this is because unsaturated fatty acid has no inhibitory effect on the growth and reproduction of Trichophyton schoenleinii of alba, mainly occur in preschool children, adolescence due to increased secretion of sebum, sebum in the unsaturated fatty acids inhibit the pathogen of tinea therefore, to adolescence can be self-healing, black ringworm children and adults can be onset.1. Chinese medicine called porrigo favus of the scalp, scabby sore, fat sticky sore, commonly known as the mangy head, Xu Lanmao rubrum invade the scalp cuticle after a lot of growth and reproduction, and soon formed needles or mung bean size papulovesicles in the hair root, and then into pustules, sulfur color dry scab to form pustules. Dry skin after expansion, fusion crust thickening, the edge, the central adhere to the scalp and slightly concave, hairy stem through the center, like the appearance of dish, called dish scutulum, scutulum is composed by Xu Lanmao rubrum and shedding of epithelial cells is fragile, contagious, hard uncovering scab the bright red skin, moist surface erosion or shallow ulcer, prone to secondary bacterial infections, a rat urine odor, accompanied by the nearby lymph nodes, hair due to pathogen invasion, become dry dull or bending, easy removal No, but finally broken hair, hair follicle damage, leaving atrophic scars and permanent alopecia, disc scutulum, atrophic scar, permanent alopecia is three favus of clinical features, if not timely treatment of skin tinea favosa, sustainable development can affect the entire scalp, forming extensive alopecia scar, but can be left to 1 2cm normal hair with the hair, can be scattered in a small number of normal hair, scar due to severe itching, scratching and its spread, Trichophyton even be infringed the trunk and limbs smooth skin and deck, can have scutulum and skin atrophy, a damage is difficult to distinguish with other onychomycosis.2. white Chinese medicine called white bald moth tonsurans,Such as surgical treatment of the book records is gradually born head moth tonsurans bald spots, long distance open, dry and itchy, by deficiency of yin and excessive heat, shave wind evil attack into the hole cou Boju, not scattered, blood gas and tide, the first manifestations of follicular papules, covered with white scales. The lesions gradually expanded, the formation of white scaly patches, roun