The human body secretes histamine along with some other chemicals in the blood as an allergic reaction to some substances. This can lead to bulky skin, itchiness, and similar symptoms. Urticaria is a common disease in people with low power of resistance and allergic to certain things.

Chronic urticaria is the term used for hives that last more than 2 months. Visually there are no such differences between normal and chronic urticaria. The most severe circumstances of hives can even last for more than two years. It was seen in a survey that chronic urticaria lasts for more than a year in more than 60% of patients with urticaria and for 18 years or more in 20% of them.

Some medications that cause allergic reactions that cause hives include: sulfonylurea, aspirin, some anticonvulsants, and more. Drug urticaria has also been a cause of critical cardiac complexities. The sulfonylurea glimepiride, a drug used to control diabetes in particular, is known to cause allergic reactions that lead to hives. Even the intake of aspirin in many cases has been seen as a cause of hives.

Other sources that cause hives:

• Insect bites: Many insects can trigger hives.

• Contact with water: a rare type of hives occurs on contact with water. This can last from 15 minutes to an hour.

• Heat: Excessive exposure to heat can also cause hives. This can be caused by spending too much time in the steam room or near an oven and similar activities. This type of hives usually lasts a few hours.

• Cold: Similarly, overexposure to cold temperatures can also cause a kind of hives. This does not last more than a few minutes.

• Stress-related: This form of hives is caused by over-exercising or spending too much time in hot baths. This is the most common reason for hives. Small red spots are seen on the skin, which can be itchy. The spots or welts are smaller than normal. It can last a few days in extreme cases.

• Vibration Related: This is one more type caused by exposure to vibrations. It is a very rare and temporary type of hives.

Other sources include:

• Pollen grains

• Fish, nuts, eggs, milk, etc.

• Excessive emotional stress

• Too much exposure to sun or cold.

Another type of hives is also known as dermatographism. It is a type of hives known for the appearance of welts or welts on the skin that causes itchy, loose or dry skin. This is the most common type of hives. In many cases it does not last long, the skin returns to its normal shape in a matter of hours.

The treatment:

Treatment begins with identifying the cause of the hives. Pinworms have been seen to lead to hives. Usually household medication and some natural herbs do the job.