Types of Hives
Acute, Chronic, Physical and Other Types of Urticaria Explained
Not all hives are the same. Doctors sort urticaria (hives) into types based on how long it lasts and what sets it off, and knowing your type can help you understand your triggers and find the right treatment. This guide gives an overview of the main types of hives, with links to a detailed page on each one.
How Hives Are Classified
Hives are grouped in two main ways:
- By duration: acute hives last less than 6 weeks, while chronic hives last 6 weeks or longer.
- By trigger: some hives appear spontaneously, with no outside cause, while others are inducible, meaning a specific physical trigger such as cold, heat, pressure or sunlight brings them on.
Types of Hives at a Glance
| Type | What sets it off | Typical pattern |
|---|---|---|
| Acute hives | Infections, foods, medications, stings, or unknown | Under 6 weeks |
| Chronic spontaneous hives | No clear outside trigger | Most days, 6 weeks or longer |
| Cold hives | Cold air, water or objects | Often as skin rewarms |
| Cholinergic hives | Raised body temperature, sweating, exercise, stress | Small welts within minutes |
| Sun hives | Sunlight on skin | Within minutes on exposed skin |
| Dermatographic hives | Scratching or stroking skin | Linear welts within minutes |
| Pressure hives | Sustained pressure on skin | Often delayed by hours |
| Aquagenic hives | Contact with water | Rare; minutes after contact |
Hives by Duration
- Acute hives: hives that last less than 6 weeks. This is the most common form, often linked to a viral infection, food, medication or insect sting.
- Chronic hives: hives that come and go for 6 weeks or longer, sometimes for months or years.
- Severe hives: hives that are extensive, intensely itchy or accompanied by swelling and need prompt attention.
Spontaneous Hives (No Outside Trigger)
- Chronic spontaneous urticaria: recurring hives with no identifiable outside cause. In some people, the immune system appears to be involved.
- Idiopathic urticaria: hives with no known cause, a term often used interchangeably with spontaneous urticaria.
- Autoimmune hives: chronic hives linked to immune system antibodies, sometimes alongside thyroid autoimmune disease.
Physical (Inducible) Hives
Physical hives are triggered by something that touches or affects the skin. They typically appear in the area exposed and fade within an hour or two, with some exceptions.
- Cold urticaria: welts and swelling after exposure to cold. Severe reactions, such as swimming in cold water, can be dangerous.
- Heat hives: hives triggered by heat or overheating.
- Cholinergic urticaria: many tiny, itchy welts triggered by a rise in body temperature from exercise, hot showers, sweating, spicy food or emotional stress.
- Solar urticaria: hives on skin exposed to sunlight, often within minutes.
- Dermatographic urticaria: raised lines that appear after the skin is scratched or rubbed. It is among the most common physical types.
- Pressure urticaria: deep, sometimes painful swelling that develops hours after pressure from straps, belts or tools. Vibration can trigger a similar reaction.
- Aquagenic urticaria: a rare type in which small welts form after skin contact with water.
Other Types and Related Conditions
- Viral hives: hives that follow a viral infection, especially common in children.
- Stress hives: hives that appear or worsen during periods of stress.
- Papular urticaria: clusters of itchy bumps caused by a hypersensitivity to insect bites, most often seen in children.
- Urticaria multiforme: ring-shaped hives with bruise-like centers in young children, often after an infection.
- Urticaria pigmentosa: brownish spots on the skin that swell and itch when rubbed, caused by a buildup of mast cells.
- Angioedema: swelling in the deeper layers of the skin, which can occur with hives or alone. Hereditary angioedema is a separate, inherited condition that does not respond to antihistamines.
How to Tell Which Type You Have
Ask yourself these questions, and write down your answers to share with your doctor:
- How long have the hives lasted? Under 6 weeks points to acute, 6 weeks or more to chronic.
- Do they appear after something specific, such as cold, exercise, sun, pressure, scratching or water?
- How soon after the trigger do they appear, and how long do they last?
- Do you also get swelling of the lips, eyelids or face?
- Did they start after an illness, new medication or stressful period?
Some people have more than one type at once, such as chronic spontaneous hives along with a physical trigger.
Do All Types of Hives Need Treatment?
Treatment depends on the type. Many acute hives clear on their own, while chronic and physical hives often need a medical plan, which typically starts with a non-sedating antihistamine and avoiding known triggers. No matter the type, hives are not contagious.
When Any Type of Hives Is an Emergency
Treat these symptoms as an emergency and call 911 if hives appear together with shortness of breath, a hoarse voice or trouble swallowing, swelling of the face, tongue or throat, a racing heartbeat, fainting, or vomiting and severe stomach cramps soon after a food, medication or insect sting. Do not wait to see whether they pass.
Get Help Identifying Your Type
If you are unsure which kind of hives you have, a specialist can help. Dr. Tiffany Young’s Hives Treatment Center in San Francisco is a practice dedicated to diagnosing and treating hives, with online and in-person consultations.
Frequently Asked Questions About Types of Hives
What is the most common type of hives?
Acute hives are the most common, and of the physical types, dermatographic urticaria is among the most frequent.
How do I know if my hives are chronic?
Hives are considered chronic when they come and go on most days for 6 weeks or longer.
Are some types of hives more serious than others?
Most are uncomfortable but harmless. Types involving swelling of the throat or tongue, severe cold reactions, or anaphylaxis can be serious and need urgent care.
Find Treatment for Your Type of Hives
Whichever type you have, there are ways to get it under control. Visit our hives treatment page to see the latest treatment options for your outbreak.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. If you think you are having a medical emergency, call 911.
