Why does my body itch when I sweat?

In the hot summer, sweating has become a daily norm for almost everyone. However, when some people sweat, their skin becomes itchy, some on the chest, some on the back, and some on the limbs. Severe itching may even cause red spots or small bumps. So, why does your skin itch when you sweat? What should I do if my skin is itchy?

The skin becomes itchy after sweating, generally for the following four reasons.

1. Allergies cause itchy skin

Allergies can cause itchy skin. Due to the body's low immunity, toxins in the blood cannot be discharged in time and accumulate under the skin. They are stimulated by external stimuli such as heat. Sweating occurs on the body surface, causing itchiness of the skin. In this case, it can be cured by improving the body's immunity and detoxifying the body.

2. Contact dermatitis

In summer, allergies are still very common. Some contact dermatitis will worsen or relapse in summer. It may be that sweat easily dissolves allergens from the contact objects and sticks tightly to the moist skin, causing an allergic inflammatory reaction, and itching is the first An emerging symptom.

3. Summer itchy skin and summer eczema

As soon as summer comes, the skin will be itchy, and the itchy areas vary from person to person, such as the calves, thighs, trunk, and especially the waist. They are all relatively common parts. For men who often wear trousers in summer, the thighs, calves, and groin are common places for skin itching in summer. The temperature is high, and the trousers are poorly ventilated and do not absorb sweat. Especially the jeans are relatively thick, so the temperature inside the trousers If it is higher, it will become more humid and hot after sweating. The skin cannot dissipate sweat and dissipate heat, and the temperature will inevitably rise.

The humid and hot summer is the best time for fungi to grow and multiply. In particular, most clothing materials have poor ventilation and are not easy to absorb sweat. As a result, areas prone to sweating such as the trunk, armpits, groin and buttocks will regenerate. Ringworm comes out. Therefore, sweat spots, tinea cruris and athlete's foot caused by fungal infections are the main causes of itchy skin in summer.

Sweat spots are many small round spots centered on pores, whitish in color, and similar spots will merge into some large spots. When they first appear, they are light pink, turn brown over time, and finally white, and are slightly itchy but not painful. Most sweat spots appear on the trunk, that is, the back, shoulders, waist, etc., and are widely distributed.

Some people feel wet and itchy in the groin, buttocks and feet, especially between the toes and soles of the feet in summer. Brown patches will appear on the groin and buttocks, and become darker over time. Blisters and peeling may occur on the toes and soles of the feet.

Therefore, keeping the fabric texture ventilated and breathable, and keeping the skin cool and dry are the basis for reducing skin itchiness in summer. In addition, you can also apply topical drugs to treat fungi. The main component of the liquid is an alcohol solution that inhibits fungi. The former is mostly used on sweat spots. Apply it once a day after bathing for about one or two weeks. For tinea cruris and athlete's foot, some antifungal ointments and creams are often used once a day in the morning and evening until the skin returns to normal for another week or two.

Four. Caused by the growth of skin bacteria

The human skin is also one of the organs that excretes body waste. In the hot summer, sweating has become a daily norm for almost everyone. After a long period of accumulation, sweat and skin waste become a large trash can, becoming a paradise for bacteria to breed, which in turn causes itchy skin. In this case, keep your body clean at all times. You can use Lanshutang anti-itch soap to deeply remove the bacteria that breeds and effectively suppress skin itching.

5. Cholinergic urticaria

Cholinergic urticaria is a type of wheal that people often call. When the body temperature increases slightly due to heat, mental stress, ingestion of hot food or drinks, or after exercise, the increased blood flow stimulates the brain's temperature regulation center, excites cholinergic nerves and releases acetylcholine. This is precisely because the body's response to acetylcholine This chemical allergy is what we call cholinergic urticaria.

The symptoms of cholinergic urticaria include:

① There will be no rash, but there will be obvious pinpricks and severe itching.

② It mostly occurs in adolescence, usually after exposure to heat (hot drinks, hot baths), emotional excitement and exercise. Symptoms can subside when you stop exercising or calm down. In severe cases, it may take months or years for symptoms to completely subside.

③Red wheals of about 2 mm often appear on the skin of the trunk and proximal limbs (except armpits, palms and soles). These wheals come and go quickly without leaving any trace. Severe cases may be accompanied by gastrointestinal symptoms, such as abdominal pain, diarrhea, etc. It usually occurs in adolescence and appears after exposure to heat (hot drinks, hot baths), emotional excitement and exercise. The rash is characterized by small wheals of 1-3 mm in size, with redness around them, mostly on the trunk and proximal limbs, and itching. Some patients are accompanied by gastrointestinal symptoms, such as abdominal pain, diarrhea, etc.

Oral cetirizine, loratadine, ketotifen, or Pi Min Xiao capsules can be used