Also known as: Urticaria
Hives are raised, itchy welts on the skin that can appear suddenly. They vary in size and may join together to form larger areas of swelling. Most cases resolve within 24 hours but may recur.
Hives affect approximately 20% of people at some point in their lives. Individual welts typically last less than 24 hours, though new ones may continue appearing.
Acute urticaria (lasting under 6 weeks) is usually triggered by allergic reactions, infections, or medications. Chronic urticaria (lasting over 6 weeks) often has no identifiable cause and may be autoimmune in nature.
Histamine release from mast cells causes blood vessel leakage, producing the characteristic raised, itchy welts.
There are several possible reasons you may be experiencing Hives. Here are the most common ones.
Foods (shellfish, nuts, eggs), insect stings, and latex trigger IgE-mediated histamine release.
NSAIDs, antibiotics (especially penicillin), and ACE inhibitors commonly cause drug-induced hives.
Viral infections are the most common trigger in children, often appearing during or after illness.
Cold, heat, pressure, exercise, and sunlight can trigger hives in susceptible individuals.
These approaches may help manage hives at home. Always consult a healthcare provider if symptoms persist or worsen.
Apply cool, damp cloths to affected areas to reduce itching and swelling.
Over-the-counter cetirizine or loratadine effectively controls most hives episodes.
Avoid tight clothing and friction on affected areas to prevent worsening.
Clinical examination of the welts. Allergy testing, blood tests for autoimmune markers, and elimination diets may be used for chronic or recurrent cases.
Seek emergency care if hives occur with difficulty breathing, throat swelling, dizziness, or rapid heartbeat, as this may indicate anaphylaxis.
Steps you can take to reduce the likelihood of experiencing hives.
Identify and avoid known triggers
Keep an antihistamine available
Manage stress levels
Wear loose-fitting clothing
Individual welts last under 24 hours. Acute episodes resolve within 6 weeks; chronic urticaria may persist longer.
Yes. Stress triggers mast cell activation and histamine release, causing or worsening hives.
If accompanied by throat swelling, breathing difficulty, or dizziness — this may be anaphylaxis requiring immediate treatment.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.