Hives: Symptoms, Causes, Prevention, and Contagion Facts

Urticaria

Urticaria, commonly known as hives, is characterized by raised, itchy welts on the skin.
Symptoms may include:
1.
Itchy, raised welts (wheals) that can vary in size and shape.
2.
Red or skin-colored bumps that may appear anywhere on the body.
3.
Swelling (angioedema) that can occur in deeper layers of the skin, often affecting the face, lips, or throat.
The causes of urticaria can vary widely and may include:
1.
Allergic reactions to foods, medications, or insect stings.
2.
Physical triggers such as pressure, temperature changes, or sunlight.
3.
Infections or illnesses.
4.
Stress or hormonal changes.
5.
Autoimmune conditions.

fred, 20~29 year old female. Ask Date: 2005/03/02

Dr. Huang Ruiyun reply Dermatology

Urticaria is characterized by transient (temporary) wheals that can disappear or change location within 24 hours.
It is an immune response, and the causes are numerous and often unidentified, making prevention difficult.
It is not contagious.

Reply Date: 2005/03/02

More Info

Hives, also known as urticaria, is a skin condition characterized by raised, itchy welts or bumps on the skin. These welts can vary in size and can appear anywhere on the body. Understanding the symptoms, causes, prevention, and contagion facts about hives is essential for effective management and treatment.

Symptoms of Hives
The primary symptom of hives is the appearance of welts on the skin, which can be red, swollen, and itchy. These welts may change in size and location, often appearing suddenly and disappearing within a few hours or days. Other symptoms may include:
- Itching: This can range from mild to severe and can be quite uncomfortable.

- Swelling: In some cases, the swelling may extend beyond the welts, affecting deeper layers of the skin (angioedema).

- Burning or stinging sensation: Some individuals may experience a burning feeling in addition to itching.

- Flushing: The skin may appear red or flushed in the affected areas.

Causes of Hives
Hives can be triggered by a variety of factors, and in many cases, the exact cause may remain unknown. Common triggers include:
1. Allergic Reactions: Foods (such as nuts, shellfish, eggs), medications (like antibiotics or non-steroidal anti-inflammatory drugs), and insect stings can provoke hives.

2. Environmental Factors: Temperature changes, sunlight exposure, and pressure on the skin can lead to hives.

3. Infections: Viral infections, especially in children, can trigger hives.

4. Stress: Emotional stress can also be a contributing factor.

5. Chronic Conditions: Some underlying health conditions, such as autoimmune diseases, can lead to chronic hives.

Prevention of Hives
While it may not be possible to prevent hives entirely, certain strategies can help minimize the risk of outbreaks:
- Identify and Avoid Triggers: Keeping a diary to track food, medications, and activities can help identify potential triggers.

- Manage Allergies: If you have known allergies, avoiding allergens and using antihistamines as prescribed can help.

- Wear Loose Clothing: Tight clothing can irritate the skin and trigger hives.

- Stay Cool: Heat can exacerbate hives, so staying in a cool environment may help.

- Stress Management: Techniques such as yoga, meditation, and deep breathing can help reduce stress levels.

Contagion Facts
One of the most important aspects to understand about hives is that they are not contagious. Hives are a reaction of the immune system and do not spread from person to person. This means that you cannot catch hives from someone else, nor can you transmit them to others. The welts and itching are a result of the body’s response to certain triggers, and while they can be uncomfortable, they do not pose a risk of contagion.

Conclusion
In summary, hives are a common skin condition characterized by itchy welts that can arise from various triggers, including allergies, infections, and environmental factors. While they can be bothersome, understanding the symptoms and causes can help in managing outbreaks effectively. Prevention strategies focus on identifying and avoiding triggers, while it is crucial to remember that hives are not contagious. If you experience persistent or severe hives, it is advisable to consult a healthcare professional for proper evaluation and treatment options.

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