How to distinguish an allergic rash infectious?

During the holidays quite common is an allergic rash, after all this time we consumed a lot of sugar, which can cause this kind of reaction of the immune system. But do not jump to conclusions: not always a rash is allergic in nature of origin. Sometimes it’s a symptom of infectious disease. How to distinguish an allergic rash from infectious to properly fight it?

What can cause a rash on your body?

The reasons are different kind of rash can be as follows:

  • Infectious diseases such as measles, rubella, chickenpox, scarlet fever, mononucleosis, mumps, meningococcal meningitis, and others.
  • Allergies.
  • Diseases of internal organs, which is violation of blood coagulation, e.g., hepatitis, cirrhosis of the liver.
  • Vascular disease and of blood, for example, hemophilia.

The rash can also occur due to insect bites, but in the winter it is not very important in our geographical latitudes.

Allergic and infectious rashes: how to distinguish between them?

So, the most common cause of a rash can be either in Allergy or certain infectious diseases. The distinction between allergic and infectious rashes:

Body temperature and overall health. Allergies she almost never increases, when hit in the body of the infection, its levels are increasing. This is due to the intoxication of the organism, which, in addition to heat, accompanied by General weakness, pain in joints and muscles, weakness, drowsiness. All this is not for allergies.

The presence of itching. Allergy rash always itchy, infectious all the more difficult. Different diseases cause different kinds of rashes, which can itch, not itch.

Stages of the appearance and localization. If you are allergic the rash usually occurs immediately and is localized on the skin where contact with the allergen (e.g., on the belt for tight synthetic clothing on the neck because of the chain, etc.). If we are talking about a food Allergy, then a rash usually can be seen on the abdomen, neck, chest, creases of the hands. The main difference between infectious rash – it usually appears in stages, depending on the disease that causes. For example, the first eruptions cover the face, the next day the stomach, even after a certain period of time limbs. Localization of infectious rash also depends on the toxin that caused it.

Blood. If the physician has doubts about what has caused a rash, Allergy or infection, he asks the patient to undergo a blood test. If you have allergies it will often promoted increased eosinophils, while infection will increase the number of white blood cells, often increased erythrocyte sedimentation rate.

Why is it so important to learn to understand what caused the rash on the body? It’s simple: without identifying the cause of the phenomenon is impossible to effectively deal with it. Skin rashes usually cause quite a serious infectious disease that should be treated properly and in a timely manner.

If you or your child has any rash, better to play it safe, consult to the doctor. Because its causes can be so diverse, and inaction will lead to loss of precious time. Should seek medical help if after taking antihistamines the rash nature has not changed, and the health of the person deteriorates. This is a sure sign that the cause of the rash is not allergic. You should also remember that rashes are a symptom of many pediatric infectious diseases, so diaper rash is a definite reason to go to the pediatrician or family doctor.


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