Should I use hot or cold compress for urticaria

In spring, some viruses and bacteria will enter the human body and cause various diseases, and it is easy to cause urticaria. After getting urticaria, the skin will become red, swollen and itchy. Treatment of urticaria must be timely, otherwise it will spread throughout the body. Before applying the medicine, you can apply a hot towel to the skin to make the blood circulate quickly, which will help the condition improve. You can also apply cold water to the skin, which will be anti-allergic. The following is a detailed introduction.

Urticaria is caused by allergies, which will cause the blood vessels in the skin to dilate, so it is better to take a bath with relatively cool water. Hot water will further aggravate the dilation of blood vessels. Oral anti-allergic drugs must be taken promptly.

The cause of urticaria is very complicated, and the cause cannot be found in about 3/4 of patients, especially chronic urticaria. The common causes include: food and food additives; inhalants; infection; drugs; physical factors such as mechanical stimulation, cold and heat, sunlight, etc.; insect bites; mental factors and endocrine changes; genetic factors, etc.

The basic lesion is the appearance of wheals on the skin. The skin often itches first, followed by the appearance of wheals, which are bright red or pale, skin-colored. A few patients have edematous erythema. The size and shape of the wheals vary, and the onset time is uncertain. The wheals gradually spread and merge into sheets. Due to edema of the dermal papillae, the openings of the epidermal hair follicles can be seen sunken downward. The wheal lasts from several minutes to several hours, and in some cases it can last for several days before disappearing without leaving any trace. The rash occurs repeatedly in batches, mostly in the evening. Wheals are often generalized but may also be localized. Sometimes it is accompanied by angioedema, and occasionally bullae form on the surface of the wheal.

Some patients may experience nausea, vomiting, headache, head swelling, abdominal pain, and diarrhea. Severe patients may also have systemic symptoms such as chest tightness, discomfort, pale complexion, accelerated heart rate, weak pulse, low blood pressure, and shortness of breath.

A disease that is cured in a short period of time is called acute urticaria. If the urticaria recurs at least twice a week for more than 6 weeks, it is called chronic urticaria. In addition to the common urticaria mentioned above, there are also the following special types of urticaria.