Celiac Disease
Patients suffering from celiac disease often have blisters caused by red, itchy, and swollen spots. These patches trigger a burning sensation, usually around the elbows, knees, scalp, buttocks, and back.
Lupus
The exact cause of hives when suffering from lupus is unclear, but patients often complain of itchy lesions on the skin.
Diabetes
Diabetic patients are at a high risk of developing urticaria. This symptom has been linked to damage of nerve fibers caused by high blood sugar levels. Diabetes also causes an increase in the production of cytokine – a pro-inflammatory protein.
Rheumatoid Arthritis
RA can cause chronic hives as red plaques or bumps on the skin. The rashes are usually itchy and painful.
Thyroid Disease
Urticaria is a common symptom of thyroid disease, which appears as patches of itchy, bumpy red skin.
Viral and Bacterial Infections
Viral and bacterial infections can trigger hives. Common bacterial infections causing hives include urinary tract infections (UTIs) and strep throat. Viruses that cause infections like mono (the kissing disease), hepatitis and colds often cause hives.