Itchy skin turns white when scratched.

There are many kinds of diseases that cause skin itching, but careful observation shows that many diseases of skin itching are obviously related to seasons, especially in spring, summer and winter. Some skin diseases itch only in winter, and some skin diseases itch only in summer. Understanding the seasonal pattern of itching can help you better judge where the problem lies. Spring itchy skin and pollen allergy spring is coming, and many people's exposed skin, such as their faces and hands, will itch, especially their faces, which will not only itch, but also be red, as if they had just finished exercising. Most itching in this season is related to pollen allergy, especially after spring outing and outing. Although there are flowers in other seasons, there are not only many flowers in spring, but also a lot of pollen at this time, so people with allergies are more sensitive. In recent years, sandstorms in the north are more serious, and many people who are allergic to sandstorms have appeared. After going out in sandstorm weather, the skin on hands, face and neck itches. If you look closely, there will be small blisters the size of a needle tip, which are itchy, but there is no obvious redness and swelling. If it happens frequently, it is always scratched by hands, and the skin will change after a long time. Doctors call it "lichenoid change". Preventing and treating things that can avoid allergies is the best preventive method. If there is really no way, think of some ways to reduce it, such as wearing gloves and scarves when going out in windy and dusty weather; In spring, there are few places where flowers bloom. When the allergy is very mild, it will get better as long as it is no longer exposed to allergens. When the situation is serious, you can take some antiallergic drugs, such as chlorpheniramine and chlorpheniramine. Itchy skin in summer Eczema can make the skin itch in summer, and the itchy part varies from person to person. Legs, thighs, trunk, especially waist are common parts. For men who often wear pants in summer, thighs, calves and groin are prone to itchy skin and high temperature in summer. In addition, pants have poor air permeability and do not absorb sweat, especially jeans are thick, so the temperature in the trouser legs is higher, and it will be more humid after sweating, so the skin can't sweat and dissipate heat, and the temperature will definitely rise. Pay attention to the material of clothes for treatment and prevention. It is best to choose pure cotton material. Don't wear jeans in hot weather unless you often work in an air-conditioned office. If conditions permit, you can gently wipe the sweaty skin with a wet towel, and fan the wind to evaporate the water, which will make you feel comfortable and cool immediately. Fungal infection in hot and humid summer is most suitable for fungal growth and reproduction, especially most clothing materials have poor air permeability and are not easy to absorb sweat. So, in the case of love sweating, tinea returned to the trunk, armpit, groin, buttocks and other places. Therefore, sweat spots, tinea cruris and tinea pedis caused by fungal infection are the main causes of skin itching in summer. How long is the sweat spot on the trunk, that is, back, shoulders, waist, etc. , and widely distributed. Sweat spots are many small dots centered on pores, which are lighter in color, and similar plaques will merge into some large plaques. It was light pink at first, turned brown after a long time, and finally turned white, slightly itchy, but not painful. Tinea cruris and tinea pedis Some people feel wet and itchy in groin, buttocks and feet, especially between toes and soles in summer. Brown patches will appear in the groin and buttocks, and the color will become darker after a long time. Toes and soles will blister and peel. Similarly, it is important to keep the fabric ventilated and keep the skin cool and dry. In addition, drugs for treating fungi can also be used externally. The main component of the liquid is an alcohol solution that inhibits fungi. The former is mostly used for sweat spots, and it is applied once a day after bathing, about one or two weeks. For tinea cruris and tinea pedis, use some ointment and cream to inhibit fungi once in the morning and once in the evening, and then use it for one or two weeks until the skin returns to normal. Contact dermatitis and allergies are still very common in summer. Some contact dermatitis will worsen or recur in summer. It may be that sweat easily dissolves allergens and adheres tightly to moist skin, so allergic inflammatory reaction occurs, and itching is the first symptom. Knowing the seasonality of pruritic dermatosis, it is necessary to master its pathogenic factors, so that the treatment and treatment methods are more accurate. In winter, the skin itches, and eczema starts in winter. Every year, when the autumn wind is cool, many people itch. The itchy place is not necessarily the place where the calf and buttocks are close to the waist, shoulders, face and back of the hand. At first, the skin was only slightly itchy, not red, swollen or painful. Patients often scratch with their hands, and the more they itch, the more they scratch, or take a bath when they itch, and the more they itch, the more they wash. Most patients will find that the itchy part of the skin will be scalded with hot water, and they will feel very happy, and the itching will be eliminated immediately, so they will be scalded with hot water as soon as they itch, and the hotter the water, the burning sensation will temporarily make the skin unconscious. If these methods are used comprehensively, the skin will peel and pigmentation, and the skin will become thicker after a long time. Treatment and prevention Avoid excessive washing and use of overheated water. Frequent washing will make the skin drier. If there is no post-bath treatment, overheated water will not only stimulate the skin strongly, but also defat it. 3. Never scratch with your hands. Facial dermatitis Many people, especially ladies, feel itchy in winter. If she keeps using the same cosmetics, she won't think cosmetics are the culprit. However, some people's skin changes greatly with the seasons. If cosmetics are water-based, such as lotions, creams, etc., it will accelerate the evaporation of epidermal moisture, which will make dry skin worse in winter, and dry skin can not adapt to many cosmetics, especially water-based. To prevent winter, we should switch to fatty skin care products instead of water-based skin care products, especially those with dry skin.