Why, when it's hot, my whole body itches.

Itchy skin in winter, eczema in winter-the cause of itchy skin in winter is unknown. There are two inferences: hypothermia leads to dry skin or decreased blood flow velocity, and the itchy part is not necessarily in the calf, hip, waist, shoulder, face and back of hand. Itchy scratches make the skin appear acute changes such as redness and swelling, and then become dry and flaky, the skin becomes thicker, and over time it becomes lichen.

Treatment and prevention: 1. Avoid washing too much and overheated water. Regular washing will make the skin drier. Overheated water is a strong stimulus to the skin, and it will also defat and cause inflammation. 2. Don't scratch your skin. 3. medication. 4. Take a bath with a weakly acidic cleanser with a pH of 5.5, which will not cause water loss. Immediately after taking a bath, apply a weakly acidic emollient with a pH of 5.5.

(1) Reduce the frequency of bathing: in autumn and winter, the weather turns cold, blood vessels contract, and sebaceous gland secretion weakens. Every bath will take away some oil on the skin surface, and sebaceous glands can't secrete enough oil to lubricate the skin in a short time, resulting in dry skin. It's cold, people don't sweat often, so there's no need to wash too often.

(2) Reduce the bath water temperature: The higher the water temperature, the better the degreasing effect. If you take a sauna, it will also accelerate skin aging. It is best to take a bath with warm water of 40-50 degrees Celsius, and the shorter the bath time, the better.

(3) Use less detergent: The more alkaline detergent is, the more destructive it is to oil. You should choose soap or shower gel, preferably weakly acidic at PH5, followed by neutral. Never use alkaline soap or washing powder to wash your hair and bathe. Don't smear all over the body when taking a bath, let alone take a bath. Focus on cleaning the face, neck, hands, feet, private parts and other key parts.

(4) Oil replenishment and moisturizing after bathing: oil replenishment immediately after bathing to prevent dry skin from losing water. Apply water-in-oil vanishing cream in autumn and winter, and focus on nursing the face, neck, hands, feet, limbs and other parts. If a part is cracked and painful, apply "chapped cream".

(5) Wear cotton underwear: the friction of chemical fiber clothes produces static electricity, which makes the skin itchy. Not suitable for direct contact with skin, can only be used as a coat. All close-fitting clothes, including underwear, underwear, autumn clothes, autumn trousers and autumn socks, should be made of 100% cotton, and the lighter the color, the better.

(6) Pay attention to heat preservation and cold protection: the legs and feet are farthest from the heart, and the blood supply is difficult to reach. Bare skin, or wearing thin clothes, blowing cold, easy to cause itching, chapped. Usually focus on keeping the calves and feet warm to avoid catching cold.

(7) Strengthen microcirculation: do more outdoor exercise, improve blood circulation, and provide adequate local nutrition, so that sebaceous glands will secrete vigorously. You can also drink a small amount of alcohol to promote blood circulation and dredge collaterals, but it should vary from person to person and do what you can.

(8) Keep the diet light: it is suitable for tonic in autumn and winter, but it can only be warmed up, not finished, and the principle of gradual progress must be observed. People with dry and itchy skin should not eat "blood-dried things" such as ginger and mutton. People with allergies should not eat "hair" such as shrimp, crab, leek and pollen.