What is a physical hill?

Physical urticaria or hives is an allergic reaction to environmental stimuli that leads to a red, itchy rash and welds on the skin. Environmental factors that can lead to physical urticaria include exposure to water or sun, delayed pressure, low temperatures, sweat and skin writing. The hives and rash usually give way to themselves, so the treatment is aimed at relieving itching. Treatment may be oral or current, via a counter or prescription; Phototherapy is also used as treatment.

histamine is a chemical that is released in response to allergy. In some areas, this fonds and causes itchy welds and a rash on the skin. Some people have an allergic reaction to certain environmental triggers. Exactly why this happens is not clear.

Aquagenic urticaria is a rare type of physical urticaria in which the water exposure causes an allergic reaction. The water temperature does not seem to be a factor in the development of the rash. Water can be cold, warm or hot and still causes reaction.

Another rareThe type of hill is caused by the sun. When someone has solar urticaria, they develop an itchy rash whenever her skin is exposed to sunlight. In order to avoid rashes and hives, a person with this condition must cover his skin whenever it is outside or stay out during the day.

The delayed pressure urticaria is caused when the skin is subject to pressure for a period of time. For example, someone who has a fixed waist or safety belt that puts pressure on the skin may exert symptoms of determination. This usually occurs between four to six hours after pressure removal. It's unusual.

cold -induced drill is also unusual. When the skin is exposed to cold conditions such as rain, wind or snow, hives develop. Doctors are not sure whether it is cold that triggers this type of hill or whether the skin war is trigger. The rash can be widespread or located into one part of the body.

Cholinergic urticaria is triggered by sweat and produces very small welds, mostly on the trunk and arms. This condition is more common than other types of hills. Some people will not get a breath after 30-60 minutes of rash duration. This condition often develops in early adulthood and can improve with age.

Dermatographic urticaria may occur when the skin is level or written. A short -term rash may develop in accordance with writing or stroking. Sometimes this rash can be very itchy, but not always. Approximately one in 20 people develops this condition, usually in early adulthood. As one ages, one can experience fewer dermatography incidents.

There is no medicine for any of these types of physical hills and treatment is symptomatic. Some individuals may find that oral antihistamines help rash faster and be less itching. Antihistamines are available to a counters or with a prescription. Phototherapeutic treatment using ultraviolet light can help some people with a physical hill but hives are kept onJust a few months. Steroids, antifungal antibiotics or tricyclic antidepressants may also be prescribed.

Local treatment containing camphors, menthol, diffenhydramine and pramoxin can be purchased through the counter. These treatments work by silencing the nerve endings, which helps to reduce itching intensity. According to some dermatologists, hydrocortisone or other cortisone -based lotions do not offer much help for physical uriticaria. Prevention and symptomatic treatment are generally the best ways of solving physical hill.