Why do I have dandruff in summer but not in winter?

Dandruff is a very annoying problem, because if there is dandruff in the hair, it will have a great impact on a person's image. If you have dandruff in summer but not in winter, it is most likely Pityrosporum folliculitis. This disease is still rare. Below, we will introduce you to the relevant knowledge about Pityrosporum folliculitis in detail.

1. Introduction to symptoms

Pityrosporum folliculitis is a fungal infection of the skin follicles caused by round or oval Pityrosporum fungi. It was officially reported and named by Potter in 1973. More common in young patients. The lesions are isolated, scattered, red, domed follicular papules or pustules. The diagnosis can be made by excluding diseases such as bacterial folliculitis, acne vulgaris, papular cutaneous candidiasis, and eosinophilic pustular folliculitis. If the damage is extensive or severe, ketoconazole tablets can be taken orally.

2. Symptoms and Signs

More common in young patients. The lesions are isolated, scattered red, dome-shaped follicular papules or pustules, 2 to 4 mm in size. It often occurs in areas rich in sebaceous glands such as the upper back and chest, and occasionally in the shoulders, arms, calves, face and neck. In severe cases, pus heads are formed, which contain pathogens and are called acniform pityriasis folliculitis. The course of the disease is chronic. The skin lesions have varying degrees of itching, sometimes with burning or tingling. It may coexist with acne and tinea versicolor. Topical or systemic use of corticosteroids or antibiotics may precipitate the disease.

3. Medication

1.2% ketoconazole lotion or ketoconazole cream for topical use.

2. For patients with extensive or severe lesions, oral administration of ketoconazole tablets 0.2 g, once a day for 2 weeks, itraconazole 0.2 g, once a day for 2 weeks, or fluconazole 0.1 g, once a day for 2 weeks can be used.

3. Remove the inducing factors. Keep the skin clean, healthy and dry, and avoid long-term local use of corticosteroids as much as possible.

4. Diet and health care

1. What foods are good for the body when suffering from pityrosporum folliculitis: Pay attention to eating less alcohol and irritating foods such as sour and spicy foods. Those who have recurrent attacks should eat less greasy foods.

2. What foods should you avoid if you have pityrosporum folliculitis: Eat more vegetables and fruits, increase vitamins, and keep your bowels open.