Symptoms
Hives may change shape or appear in clusters. Sometimes hives join together to form larger patches.Common symptoms include:
- Raised pink bumps with pale centers (welts)
- Red, raised, itchy rash on the skin
- Brownish patches on the skin
- Hive like bumps filled with fluid
- Burning sensation
Causes
Hives are generally caused by an allergic reaction. Some of the more common allergies that cause hives include: viral infection, such as the common cold or flu. Other causes include:- Foods, especially shellfish, tree nuts, milk, and fruit
- Medications and allergy shots
- Pets and other animals
- Pollen, Insect bites and stings
- Exposure to the sun or cold
- Exercise
- Contact with chemicals
- Putting pressure on the skin, such as from sitting too long or carrying a heavy bag over a shoulder