Rashes can come in all shapes and sizes. Some itch or even hurt, while others are barely noticeable. Small,
localized rashes are usually caused by skin problems such as skin inflammation or an allergic reaction to so a substance you’ve been in contact with. These rashes tend to be only an external problem, however a rash that covers your whole body can be a sign of internal health issues. Whether it suddenly appears or is slowly spreading, a rash all over your body should be examined by a doctor to pinpoint the underlying cause. Digestive disorders, thyroid problems, drug reactions and certain cancers are the four main causes of rashes that spread all over the body.
There are a number of digestive system disorders that can lead to a full body rash. These include liver disease, kidney problems and Celiac disease.
Both the liver and kidneys are responsible for cleaning toxic substances out of the bloodstream. If either of thes
e organs is having problems, those substances can build up and cause a rash to break out all over the body. Severe kidney problems can arise after experiencing direct damage to the kidneys, from having a condition that impairs blood flow or from blockages within the kidneys’ drainage tubes or ureters, that can prevent waste from leaving the body. Individuals suffering from kidney failure commonly get a full body rash that starts at the feet and spreads upwards, covering the stomach, arms and ears. Rashes caused by liver problems are often extremely itchy due to the skin drying out from the toxins in the body. The most common causes of chronic liver failure are hepatitis B, hepatitis C, malnutrition, long term alcohol consumption and hemochromatosis, a disorder which causes the body to absorb more iron than it needs.
Celiac disease is a condition in which the intestinal tract can not absorb gluten proteins commonly found in food containing wheat, barley and rye. This causes the immune system to react to the proteins as if they were a toxin in the body and break down the lining of the intestines in an attempt to destroy the gluten.
Breaking down the intestinal lining causes nutritional deficiencies which often lead to symptoms like fatigue, seizures and a rash that covers the whole body. Individuals with Celiac disease can often prevent these rashes by sticking to a gluten-free diet.
When thyroid glands produce more of the thyroxine hormone then a person needs it can cause hyperthyroidism
and a large, lumpy skin rash known as Graves’ dermopathy. This rash usually begins on the shins and on tops of the feet. Affected skin areas may have a texture that feels like an orange peel and appear red and swollen. The thyroids overproduction of the hormone is often due to an immune system disorder where the body is attacking the thyroid gland which causes it to produce an excess of thyroxine. While there is no current cure for Graves’ dermopathy, there are many treatment options available to control the symptoms by either decreasing the production of thyroxine, or blocking it’s actions on the body.
A large number of prescription drugs can cause allergic reactions that present as a full body rash. This includes both topical medications and ingested drugs. The allergy is caused by a series of chemical reactions to the drug within the body. Drug allergies do not always occur the first time someone takes a prescription so some individuals do not have signs of an reaction until they have taken multiple doses.
While many different prescriptions can cause this reaction, it is most typically seen as an allergy to antifungal drugs, such as clotrimazole; painkillers like oxycodone or duloxetine and antibiotics such as penicillin and cephalosporins. Rashes caused by an adverse drug reaction can often present with hives and a fever and are usually treated by a medication change.
Any cancer that affects the immune system can cause large full body rashes. Some of the most common include leukemia and lymphoma. Those suffering from leukemia often develop petechiae, which is small, red rash-spots that spread all over the body. Lymphoma patients do not develop petechia, but instead can suffer from an itchy, red rash.
Chicken pox full body rash
A rash all over the body can also be a sign of chicken pox which is also known as varicella. Some of the early signs are headache, loss of appetite and fever. Generally after a few days a rash will start to develop, the characteristics are red and sometimes pink bumps which cover the full body. The bumps can scab over and appear to heal they can also be filled with fluid which on occassion will leak.
The bumbs will start in one place but might move across the body and not stay in the same place.
Hives which is also known as urticaria is a other rash that can cause a full body rash to form all other the body. This rash is rapidy spreading and can sometimes be visible and sometimes not. The characteristics is a red raised rash that rapidly spreads and is itchy. Hives can be rapid in its growth and if you experience difficulty in breathing you should consult immediate help. This is even more important if you experience throat swelling as this is caused by a sudden release of the chemical histamine.