Reviewed by medical experts • For informational purposes only
Urticaria (hives) happens when mast cells in the skin release histamine - triggered by foods, medicines, infections or physical factors, though chronic hives often have no findable cause.
Urticaria - hives, called "pitti" or "sheet-pitta" in many Indian households - appears when mast cells in the skin release histamine and other chemicals. The histamine makes small blood vessels leak fluid into the skin, producing the raised, itchy wheals. What sets the mast cells off varies widely.
Common triggers of acute urticaria (lasting under 6 weeks):
Physical urticarias (a distinct group): hives triggered by physical stimuli - pressure (tight straps, sitting), scratching (dermographism - writing on the skin), cold, heat, sunlight, sweating/exercise (cholinergic), and water (rare). Each has its own pattern and its own avoidance strategy.
Chronic urticaria (over 6 weeks) - the honest truth: in the large majority of chronic cases, no external cause is ever found. This is not a failure of testing but the nature of the disease: chronic spontaneous urticaria is often - the body's own antibodies activate the mast cells. It is not an , not "impure blood", and not caused by eating something wrong for years. Knowing this saves patients from years of unnecessary food bans and expensive allergy panels.
Associated conditions worth checking in chronic cases: thyroid disease (especially autoimmune thyroiditis), and occasionally other autoimmune conditions.
Remember: acute hives usually trace to infection, medicines or food; chronic hives are usually the immune system misfiring on its own. Lip, tongue or throat swelling with hives is a different, dangerous event - emergency care, always.
Ayurveda's Sheetapitta/Udarda describes wind-and-cold-linked itchy wheals - a descriptive parallel. The histamine mechanism and the autoimmune nature of chronic cases are modern findings that guide real treatment.
Written By
Sanatan Ayurveda
BDS
Reviewed By
Dr. Varun Gupta
MD Pharmacology, MBBS
Last updated on
27 Sep 2022 • 06:23 PM (IST)
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Urticaria shows as raised, intensely itchy wheals that appear suddenly, migrate across the body and each vanishes within 24 hours; swelling of lips, tongue or throat signals dangerous angioedema.
The main dangers of urticaria are angioedema with throat swelling and anaphylaxis - both 112 emergencies; chronic hives themselves harm sleep, mood and quality of life more than the body.
Urticaria moves from a trigger or immune signal to histamine release, wheal eruption within minutes, spontaneous fading within 24 hours, and - in chronic cases - cycles of flare and quiet over years.
Cold compresses, loose cotton clothes, lukewarm baths and avoiding scratching genuinely ease hives at home - but throat or tongue swelling is never a home-remedy situation, it is an emergency.
Only ban foods with a proven personal reaction; blanket diet bans in chronic urticaria are useless and harmful - though a short low-histamine trial can help some, and alcohol often worsens hives.
Non-sedating antihistamines (cetirizine, loratadine, fexofenadine) are the mainstay - taken daily for chronic hives; steroids are short-course rescue only, and omalizumab helps stubborn chronic cases.
