An itchy raised patch appears, fades, and is replaced by another somewhere else. If this sounds familiar, it may be urticaria, often called hives or “skin allergy.” Recurrent symptoms can affect sleep, work and confidence, but finding a hidden food allergy is not always the answer.
Sudden tongue or throat swelling, difficulty breathing or swallowing, fainting or collapse needs emergency care. Use prescribed adrenaline if available. Do not wait for an antihistamine to work.
When are hives called chronic?
Typical wheals are raised, itchy patches that usually disappear from one spot within 24 hours without leaving a bruise. New patches can keep appearing. Deeper swelling of the lips, eyelids or other areas is called angioedema and may last longer.
Recurrent wheals, angioedema or both for more than six weeks are chronic urticaria. Some episodes follow pressure, cold, heat or exercise; others occur without a consistent external trigger. A painful patch that stays in the same place beyond a day, leaves bruising or accompanies fever or joint pain deserves reassessment.
Why does it keep coming back?
Skin cells called mast cells release chemicals such as histamine. In chronic spontaneous urticaria, immune-system activity can contribute. A specific food allergy is rarely the underlying explanation for weeks or months of recurring spontaneous hives.
However, a reproducible reaction soon after a particular food, medicine or sting needs a different assessment. Discuss painkillers, infections and physical triggers. Do not test a suspected serious trigger at home or label every meal unsafe.
Do IgE tests identify the cause?
There is no single blood test that solves every case. The history, photographs and examination come first. A clinician may select a blood count, inflammation tests or further investigations when useful. Specialist assessment may sometimes include total IgE or thyroid antibodies.
Broad allergy panels are not routinely helpful for typical chronic spontaneous urticaria. A positive sensitisation test does not necessarily prove that a food causes your symptoms. Food-IgG panels should not determine a restrictive diet.
What treatment helps?
A modern, second-generation H1 antihistamine is usually the first medicine. For persistent symptoms, the clinician may adjust a selected drug's dose, sometimes beyond its usual licensed dose, or consider specialist treatments. Do not increase doses or combine brands yourself. Pregnancy, kidney disease, drowsiness and other medicines affect the choice.
Long-term oral steroids or repeated steroid injections are generally unsuitable for ongoing control. Difficult cases may need targeted treatment, including biologic options, after appropriate assessment. The aim is reliable symptom control with a plan for review; there is no guaranteed fixed cure time.
What can you do between visits?
Take clear photographs before patches fade. Note how long each patch stays, swelling episodes, new medicines and any consistent trigger. Loose clothing, a cool environment and avoiding a trigger that is genuinely reproducible can help. Avoid unnecessary food bans that reduce nutrition without improving symptoms.
Common questions
Is it always food allergy?
No. Recurrent spontaneous hives commonly have another mechanism. A clear immediate reaction after a specific exposure is important to report.
Can I change the antihistamine dose myself?
No. Bring all strips and bottles to the consultation, including “allergy combinations” and sleep medicines, to avoid duplicate ingredients.
Where can I get help in Patna?
The allergy, asthma and respiratory clinic offers assessment of recurrent hives and medication review, with further testing or specialist referral when needed. For sneezing and blocked nose, see our separate dust allergy guide.
Sources
International urticaria guideline, 2026; NHS information on hives and anaphylaxis; AAAAI allergy-testing guidance.
This article is for health education and does not replace an individual medical consultation. Symptoms, test results, medicines, and treatment decisions should be discussed with a qualified clinician.
Seek urgent medical care for severe breathing difficulty, chest pain, confusion, fainting, uncontrolled bleeding, severe dehydration, or rapidly worsening symptoms.