Hives can appear as the immune system fights a viral infection, often as the infection is clearing up, but it doesn't necessarily mean the virus is "leaving" the body at that exact moment. Rather, they are a sign of the body's immune response being activated.
The most common cause of hives all over the body is viral infections. Research has confirmed this. Other symptoms such as a fever, cough or diarrhea are also present. The hives may last 3 days.
Hives (urticaria) in kids are red, itchy welts caused by histamine release, often triggered by common viral infections (the most frequent cause), allergic reactions to foods (milk, nuts, eggs), medicines (like antibiotics), insect stings/bites, or contact with irritants, but sometimes a clear cause isn't found, especially with chronic hives. Other triggers include heat, cold, pressure, scratching, stress, and even certain foods or exercise.
Hives can commonly occur without a trigger, and may be the immune system responding to a viral illness/cold. These hives commonly come and go for a few days to weeks.
Some infections that can cause hives in children include respiratory viruses (common cold), strep throat, urinary tract infections, hepatitis, infectious mononucleosis (mono) and many other viral infections.
Color: Viral rashes are often red or pink. Texture: The skin can feel flat or have raised bumps (papules) Shape: These rashes may cover large areas or appear as small spots that blend together. Itching: They may or may not be itchy.
Lifestyle and home remedies
Common bacterial and viral infections known to cause hives include:
The welts that come with hives are caused by the release of immune system chemicals, such as histamine, into your bloodstream. It's often not known why chronic hives happen or why short-term hives sometimes turn into a long-term problem. The skin reaction may be triggered by: Heat or cold.
Post-viral rashes can take different forms, but they are typically: Flat or Raised Red Spots: These may appear on the trunk, arms, or legs and can be slightly itchy or tender. Blotchy or Lacy Patches: Some rashes, like those from roseola or fifth disease, create a lace-like pattern on the skin, especially in children.
Medically referred to as urticaria, this uncomfortable skin rash may last a few minutes to several days. In some cases, it can even develop into a chronic illness that lasts for years or months. Allergies are the most frequent cause of hives, but various other things may induce the condition.
At-home treatments: To relieve hives, you can take a cool bath or shower, wear loose-fitting clothing and apply cold compresses. An over-the-counter (OTC) hydrocortisone or antihistamine cream can relieve itching and swelling.
Red, raised welts or bumps on your skin that may hurt or sting. Blanching (the center of the hive turns white when you press it). Itchy skin (pruritus).
Guessing can delay healing or lead to complications, so seeing a dermatologist ensures you start with the safest, most effective approach.
The most common hive-inducing food allergies in kids include:
Five signs of a weak immune system include frequent infections, slow-healing wounds, persistent fatigue, ongoing digestive issues, and getting sick with things that last a long time, like a cold that lingers or severe infections requiring strong treatment. These indicate your body struggles to fight off pathogens or repair itself effectively.
Viral infection is the most common cause of hives that can last days to weeks. The body gets excited about fighting the infection and begins provoking mast cells to release histamine. Sometimes the hives start while the infection is active, other times they begin shortly after the infection.
Hives that last longer than six weeks or with recurring outbreaks over a six-week period are most commonly caused by viral or bacterial infections like Helicobacter pylori (bacteria in the stomach), hepatitis or a dental infection. Autoimmune diseases like lupus and Hashimoto disease can also cause hives.
If you're unaware that you harbor such an illness, regular hives outbreaks may be a notable sign. And even if your hives are merely the result of an allergic reaction, they can coincide with other severe and life-threatening allergic responses such as wheezing, trouble breathing, swelling of the tongue, dizziness, etc.
Likewise, urticaria can be associated with malignant neoplasms such as lymphoma, leukemia and ovarian carcinoma[28].
The hives rash looks like raised bumps or welts on the skin that are usually itchy, but may also sting. These can be red or skin-coloured. The raised areas of skin are known as wheals. Patches of hives often join together to form larger swollen patches or urticaria.
Antihistamines are a common choice for treating hives. They block histamine, a chemical that makes blood vessels swell. This leads to itching and redness. Antihistamines can greatly reduce hives symptoms, making them a favorite for those with urticaria.
You cannot pass them on to others. The underlying cause, such as a virus, might be contagious, but the skin reaction itself is not. Hives are a symptom, not a disease.