What causes red rashes on the chest and back that are also itchy?

Jul 04, 2024 Source: Cainiu Health
Disease description:

I am 30 years old. While showering, I noticed that many red rashes have appeared on my back and chest. They look like blisters and are red and itchy. I would like to know what may have caused these red, itchy rashes on my chest and back?

Doctor's answer (1)
Dr. Wang Xiaoyan
The symptoms of red rashes accompanied by itching on the chest and back may be caused by various factors. The main causes include: 1. Urticaria: Urticarial rashes typically appear as wheals, with possible intensification of itching at night. These rashes usually subside within 24 hours. Common causes include food, medications, infections, physical factors, and psychological factors. 2. Eczema: Eczematous rashes are accompanied by significant itching and may present with surface exudation or crusting. Prolonged exposure to damp environments and consumption of spicy or irritating foods may trigger eczema. 3. Contact Dermatitis: Contact with certain substances, such as animal fur or pollen, may lead to contact dermatitis, causing rashes and itching. 4. Folliculitis: Poor personal hygiene leading to bacterial infection of hair follicles can also cause red rashes and itching. 5. Allergy: Allergic reactions to clothing materials or fabric types of undergarments can similarly result in localized rashes and itching.