Urticaria: Understanding Hives and Everyday Triggers
Written by Megan Marshall. Reviewed by the JulieMay product and garment-tech team.
Quick answer: Urticaria (hives) are itchy, raised welts that affect about 1 in 5 people at some point. Triggers include foods, medications, infections, heat, cold, pressure, stress, and contact irritants in clothing such as latex, nickel, dyes and synthetic fibres. Track flares in a diary, choose breathable natural fabrics with covered elastics, and see a doctor if hives persist beyond a few days or keep returning.
Hives (also called urticaria) are itchy, raised welts that can appear out of nowhere, and nearly one in five people will experience them at least once in their life. They are uncomfortable, often confusing, and sometimes stressful when you cannot pinpoint the cause.
In this guide, we break down the most common triggers, share simple at-home ways to start connecting the dots behind the cause of your hives, and highlight when it is time to involve a doctor. We will also touch on lifestyle swaps that may help sensitive skin stay calmer day to day.
What are hives (urticaria) and how common are they?
Hives, or urticaria, can show up anywhere on the body. They may look red or skin-coloured, and for some people they sting or burn on top of itching. Individual welts can stay small, or merge into larger patches that sprawl across the skin. On darker skin tones, hives may be harder to spot at first, appearing more skin-coloured or subtly swollen rather than bright red, yet the discomfort is the same.
Most people think of hives as brief flare-ups, and that is often true. Acute hives come and go within days or a few weeks. Chronic hives, however, tell a different story: when symptoms occur most days for six weeks or longer, it is considered chronic urticaria, and flare-ups can continue for months or even years.
Hives are also very common. About 20% of people will experience them at least once. Thankfully they are not dangerous, but they can be uncomfortable, disruptive and frustrating, especially when the cause is not clear.
Common triggers for hives and skin allergies
Certain foods
For some people, hives are tied to what they eat, but less often than most assume. Common food triggers include nuts, eggs, shellfish and, in certain cases, additives or preservatives. Some people also notice reactions to high-histamine or pseudoallergen-rich foods, though research suggests only a subset of chronic urticaria patients benefit from dietary elimination.
Medications and infections
Medications can also play a role. Antibiotics and NSAIDs like ibuprofen or aspirin are among the most frequently reported drug triggers for hives. Beyond food and medication, viral or bacterial illnesses often spark acute hives during or shortly after an infection.
Physical and emotional triggers
Hives also flare in response to the world around us. Heat, cold, exercise, pressure (tight waistbands or straps), vibration and sunlight are all documented triggers for certain types of inducible hives. Stress can amplify symptoms too, worsening or prolonging flare-ups.
Clothing allergies and hidden irritants
Latex, elastic, polyester, nylon or rough seams can irritate sensitive skin or provoke contact hives along bra lines, waistbands or leg openings. Metal components like nickel or cobalt in hooks or underwires, plus residues from dyes, fragrances or detergents, can also trigger reactions. Wearing natural, hypoallergenic fabrics and covered elastics can help reduce direct contact with these common clothing-related irritants.
How to start identifying your hives triggers
One of the easiest ways to get clarity on the cause of your hives is to track what is happening before, during and after a flare. A short daily log works well: note foods, medications, new skincare or detergents, stress levels, exercise, weather and temperature, and clothing details (tight straps, synthetic fabrics, a new bra, and so on). Over time, these notes can reveal repeating patterns you might never have caught in the moment.
Patch testing and allergy evaluation
A dermatologist or allergist can take a detailed medical history, examine the skin during or after a flare, and ask the kinds of targeted questions most of us would not think to ask on our own. Depending on your situation, they may recommend allergy testing (such as skin-prick or blood tests) to check for reactions to foods, medications or environmental allergens. For suspected contact allergies to metals, fragrances, preservatives or rubber chemicals, patch testing can help identify the specific culprits that touch the skin.
It is important to know that in many cases of chronic hives, no single cause ever shows up, and that is normal. Even so, testing can rule out serious conditions, narrow the possibilities and help you make safer day-to-day choices. If recurring hives are getting in the way of sleep, comfort or confidence, a board-certified dermatologist or allergist is often the most helpful next step.
When to call a doctor or emergency services
If welts appear alongside difficulty breathing, chest tightness, dizziness, or swelling of the lips, tongue or throat, seek emergency care immediately, as these can signal anaphylaxis. For non-emergencies, see a doctor, such as a dermatologist or allergist, if hives last more than a few days or keep returning.
Lifestyle changes to help calm sensitive, hive-prone skin
Once you have identified some possible triggers (or at least ruled out a few), the next step is exploring small lifestyle shifts that support your skin rather than overwhelm it.
Changes to diet and daily habits
For some people, small shifts in diet and routine can make flare-ups less frequent or less intense. Common adjustments you might explore include:
- Reducing alcohol and ultra-processed foods.
- Talking to your doctor about trying low-histamine or pseudoallergen-light meals.
- Increasing daily hydration.
- Prioritising sleep and consistent mealtimes.
- Practising stress-reducing activities like breathwork, meditation, yoga or journaling.
- Incorporating walks or light movement to help regulate stress and energy.
Choosing skin-friendly fabrics and detergents
Skin friction, heat, sweat and harsh chemicals often go unnoticed until a rash appears. If hives or rashes tend to show up along your bra line, waistband or underbust, swapping tight synthetics for breathable natural fabrics (like organic cotton or silk) can help keep your skin cooler and calmer.
People with latex or elastic sensitivities may also benefit from covered straps and bands, where no rubber-based material sits directly on the skin. And because detergents and fragrances can provoke irritation, many dermatologists suggest fragrance-free, dye-free formulas, especially for clothing that sits close to the body.
How JulieMay lingerie supports sensitive, hive-prone skin
Hives can feel frustrating, unpredictable and sometimes embarrassing, but they are incredibly common, and often manageable with the right information and support. The key is to understand what is happening on your skin, pay attention to your own patterns, and make small adjustments that reduce irritation over time.
If clothing seems to be one of your hives triggers, consider hypoallergenic lingerie. At JulieMay, we design all our bras and briefs with sensitive skin in mind, using organic Pima cotton and silk while avoiding harsh dyes, latex and synthetic linings, and we wrap any elastics in cotton so they do not touch the skin directly. Find pieces that support your skin instead of fighting it: explore our collection of hypoallergenic lingerie today.
Frequently asked questions
What is urticaria?
Urticaria, or hives, is an outbreak of itchy, raised welts on the skin. It can be acute (lasting days to weeks) or chronic (most days for six weeks or longer), and affects about 1 in 5 people at some point.
What are the most common hives triggers?
Foods (nuts, eggs, shellfish, additives), medications (antibiotics, NSAIDs), infections, physical triggers (heat, cold, pressure, exercise, sunlight), stress, and contact irritants in clothing such as latex, nickel, dyes and synthetic fibres.
Can my clothes cause hives?
Yes. Tight synthetics, rough seams, exposed elastic, nickel hardware and harsh dyes or detergents can provoke contact hives along the bra line, waistband and leg openings. Breathable natural fabrics with covered elastics help.
When should I see a doctor about hives?
Seek emergency care if hives come with breathing difficulty, chest tightness, dizziness or swelling of the lips, tongue or throat. Otherwise, see a doctor if hives last more than a few days or keep returning.
Last updated: June 2026.
