Scalp pityriasis
Introduction
Introduction to scalp pityriasis Capitispityriasis, also known as pityriasissimplexcapitis, is commonly known as dandruff. The scalp has small flaky scales that fall off or can be slightly oily. basic knowledge Sickness ratio: 0.1% Susceptible people: no specific population Mode of infection: non-infectious Complications: bacterial infections sepsis and bacteremia
Cause
Cause of scalp pityriasis
Endocrine factors (30%):
More common in adulthood, androgen stimulation may play a role, a certain level of sebaceous gland activity is also an essential factor, but its severity varies greatly.
Genetic factors (25%):
There may be genetic factors. The falciparum prion population is proliferated in the scalp pityriasis. The prevalence of patients with the same disease in the family members is higher than that without the disease.
Other factors (20%):
Some studies have analyzed that the disease is secondary, so the follow-up of other diseases is also considered to play a part in the pathogenic factors.
Pathogenesis
The entire skin of the human body is continuously exfoliated with keratinous scales. In the scalp, the normal hair loss process is hindered, and the keratin sheets remain in the hair shaft.
Prevention
Scalp rash prevention
Pay attention to personal hygiene is more important, wash your hair and change your pillow. Since dandruff is caused by infection by fungi (Malariae), it is necessary to adjust the lifestyle and avoid frying, greasy, spicy and other foods to regulate and protect the scalp itself and inhibit the overproduction of Malassezia. Thereby reducing the chance of dandruff. In addition, fungi are contagious, so the living hygiene between individuals and family members, the use of towels, pillows, combs and other daily necessities, can reduce the degree of Malassezia between people to some extent. Spread to prevent dandruff from occurring.
Complication
Scalp pruritus complications Complications bacterial infection sepsis and bacteremia
The scalp pityriasis is usually accompanied by obvious itching, which can cause skin rupture due to scratching. Because the skin integrity is destroyed, it can cause skin bacterial infection or fungal infection due to scratching, usually secondary to low body, or long-term use. Immunosuppressive agents and patients with fungal infections such as onychomycosis, such as concurrent bacterial infections, may have symptoms such as fever, swelling of the skin, ulceration, and purulent secretion. Severe cases can lead to sepsis, which should be brought to the attention of clinicians.
Symptom
Scalp pityriasis symptoms common symptoms scaly prickly rash-like rash
Small silver-gray lamellae or squamous squama are stored on the top of the head, above the top and at the crotch, can be limited to one or more places, usually symmetrical patches, sometimes involving the entire scalp, if there is early baldness There is no eczema in the bald area, and the scales are mostly adhesive. Only after brushing or combing, they are separated from the hair shaft and fall off on the clothes. The scalp pityriasis susceptibility to seborrheic dermatitis is increased, and light seborrheic dermatitis sometimes It is called pityriasis steatoides, which has large scales, thicker and more adhesive. If the scales are forcibly stripped, the lower scalp is moist and red.
Examine
Examination of scalp pityriasis
Scalp examination: The scalp examination is a method of detecting the pH value of the scalp and measuring the health of the scalp.
Diagnosis
Diagnosis of scalp pityriasis
According to clinical manifestations, the characteristics of skin lesions can be diagnosed.
Severe types of ichthyosis can be associated with severe desquamation, white sputum has limited scaly and hair breaks, microscopic examination can find fungi, afternoon light examination shows green fluorescence, persistent large scales should consider the possibility of psoriasis, traumatic baldness Hair can be caused by severe changes in inflammatory changes accompanied by severe localized desquamation, and a large number of adhesive asbestos-like scales are found in asbestos-like pityriasis.
