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Many people describe pityriasis rosea as "roses growing on the skin".It sounds nice, but it's actually really annoyingIn addition to being red, it may also itch, grow larger and larger, and take a long time to subside.ImmunityWhen you are at a low point, you may relapse, which is very worrying.

What's even more frightening is that the Internet says that you need to strictly avoid certain foods, get shots to enhance immunity, and use ultraviolet rays... Is this true? Here we will introduce to you what kind of disease pityriasis rosea is and what treatments can be taken.

The most typical manifestation of pityriasis rosea is oval scaly erythema and papules on the trunk and proximal limbs, which are distributed in a centripetal manner.

50%~90% of patients will develop "prodromal spots" on the neck, trunk and other parts before large-area skin lesions appear.Also called "mother spot", usually 2 to 5 cm in diameter.

After a few days or 1 to 2 weeks, the appearance ofOval lesions similar to the mother spot but smaller in diameterThe long axis of these lesions often coincides with the direction of the dermatoglyphics. This characteristic arrangement is most obvious on the back, where the dermatoglyphics have a more obvious oblique arrangement. This morphological pattern is also likened to“Christmas tree” distribution。

Some patients may have cold-like prodromal symptoms such as headache and sore throat before skin lesions appear, so some studies suggest that the onset of pityriasis rosea may be related to human herpes simplex virus type 6 or 7.（HHV）InfectRelated, but controversial, soThere is no definitive answer as to the cause of pityriasis rosea.

Recurrent pityriasis rosea accounts for 1.8% to 3.7% of all cases, and most cases relapse within a year. It is speculated that the recurrence of pityriasis rosea may be due to the reactivation of HHV and cell-mediatedimmunityA temporary decrease in monitoring capabilities.In other words, the body's immunity has declined in the short term.

It is rare for patients to have multiple relapses of pityriasis rosea. If the symptoms keep recurring, you should go to the hospital for treatment in time.

Patients with this disease often have a history of unclean sexual contact.ItchingSymptoms include pink to reddish brown macules or patches, without the appearance of "mother spots".The most common rashes are on the palms and soles of the feet., and may also be accompanied by "worm-eaten" hair loss and a history of hard but not very painful ulcers on the genitals.

If the possibility of the disease is highly suspected,It is necessary to complete relevant blood tests and seek treatment as soon as possible.

The lesions of this disease have slightly raised edges and clear boundaries. They may appear as erythema or plaques. They are single or scattered in a small number of cases. They are generally not distributed symmetrically or along the skin texture.Clinically, fungal smear or fungal culture can be performed to identify the disease.

The disease is most common in children and adolescents.Small red, scaly, teardrop-shaped plaquesThe scales of pityriasis rosea are often thicker and rougher than those of pityriasis rosea, and the mother spot does not appear.

In addition, patients with guttate psoriasisOften a history of streptococcal infection(Symptoms such as headache, sore throat, fever, etc.). During the physical examination, the doctor may scrape the rash and the scales will fall off, leaving a shiny film underneath. If you scrape it again, some punctate bleeding spots will appear.

Pityriasis rosea is actually a self-limiting disease andThere is no clear evidence that it is contagious, and it usually disappears on its own from the proximal end to the distal end within 1 to 3 months.Most people with pityriasis rosea who have no symptoms do not need treatment.

If itching occurs,Symptomatic treatment is sufficient. It can be applied externally on skin lesions as directed by the doctorGlucocorticoidsOintments and mild moisturizers. If the itching is more obvious and affects daily work and life, oral antihistamines such as loratadine and ebastine can be taken as prescribed by the doctor.

If the patient has high requirements for beauty, or suffers from recurrent pityriasis rosea,Active intervention may be considered to shorten the course of the diseaseTreatment includes oral acyclovir, macrolidesantibiotic(such as erythromycin), and ultraviolet light therapy, etc. The specific diagnosis shall be subject to the doctor's diagnosis.

Patients often feel anxious and fearful because a new rash appears after pityriasis rosea has not subsided for several days. In fact, as long as they understand that the disease is self-limiting, their anxiety can be relieved to a great extent.

In daily life, you should pay attention to the combination of work and rest, exercise moderately, avoid excessive fatigue, and maintain an optimistic mood.

There is no evidence that so-called "irritating foods" can cause the rash to worsen. As long as there is no clear food allergy, it is recommended to pay attention to a balanced diet and there is no need to avoid certain foods.

During ultraviolet phototherapy, do not eat foods that may cause photosensitivity reactions, such as figs, navel oranges, coriander, wild vegetables, lettuce, etc.

Do not use strong alkaline soap to take a bath, avoid using irritating topical medications, avoid scratching the skin, and if itching is severe, take oral antipruritic drugs or topical medications as prescribed by your doctor.

Observe changes in skin lesions regularly, avoid sun exposure in summer, apply more moisturizer to prevent skin dryness, and wear loose and soft clothes.