Pityriasis rosea dry skin wrinkles

Spring is a high-risk period for the growth of bacteria and viruses. If your immunity is relatively low, your skin will suffer from pityriasis rosea. The specific manifestation is the appearance of red patches on the body, accompanied by itching and pain. At this time, you must avoid eating spicy foods, add more vitamins and protein to your daily diet, improve your immunity and resistance, and if the condition is severe, you can apply ointment to relieve the condition.

Causes

Not yet clear. Because the disease has seasonal attacks, the rash is self-limited, rarely recurs, and initially appears as prodromal spots, and no definite allergic substance has been found to cause the disease, most people believe that it is related to viral infection. The results of the study suggest that the onset of roseola is directly related to Coxsackie B virus infection. In addition, the claims that the disease is caused by fungi, bacterial infections or other microorganisms such as spirochetes have not been confirmed. Some people also believe that it is an allergic reaction to some kind of infection or a skin manifestation of gastrointestinal poisoning.

Clinical manifestations

This disease often occurs in young or middle-aged people, especially in spring and autumn. The initial lesions are rose-colored pale red spots with a diameter of 1 to 3 cm on the trunk or limbs, with thin scales, called prodromal spots, which number 1 to 3. After 1 to 2 weeks, red patches of varying sizes appear on the trunk and limbs, often distributed symmetrically. It starts from the trunk and then gradually spreads to the limbs. The patches vary in size, ranging from 0.2 to 1 cm in diameter, and are often oval in shape. There are fine scales in the middle of the patch, and a layer of thin scales with a free edge inward on the surrounding circular edges. The long axis of the patch is parallel to the ribs or skin texture. May be accompanied by varying degrees of itching. In a few patients, skin lesions are limited to the head, neck or limbs.

In a small number of patients, the initial skin lesions are red papules, which may merge into patches. These patients often experience severe itching, which is called papular pityriasis rosea.

There is another type of patient with an acute onset of disease, without prodromal spots, and mostly with large red patches or maculopapules on the lower abdomen or inner thighs, with severe itching. The lesions quickly spread to the trunk and limbs. These lesions gradually develop into crusted lesions in the central part, and the scabs fall off to form roseola-like lesions. This type of patient may be caused by autosensitivity reactions, so it is called rose-type autosensitive dermatitis.

examine

Histopathology: It manifests as nonspecific chronic inflammatory changes, with focal parakeratosis, mild acanthosis, spongiosis and intracellular edema in the epidermis, and moderate vascular dilation, edema and lymphocytic infiltration in the superficial dermis.

diagnosis

Based on the precursor spots, the predilection sites, and the morphology of the rash, which includes typical red circular bran-like scaly patches with free edges pointing inward, and the long axis of the rash parallel to the skin texture, the diagnosis is not difficult.