What causes itchy bumps that look like mosquito bites?

Jun 20, 2024 Source: Cainiu Health
Disease description:

I have developed many red pimples on my body that are slightly itchy, similar to the symptoms I've had after mosquito bites before. However, I haven't been bitten by mosquitoes this time, so I'd like to know what could cause itchy, mosquito bite-like bumps.

Doctor's answer (1)
Dr. Wang Xiaoyan
Itchy bumps similar to mosquito bites are usually caused by the following reasons: 1. Allergic reaction: Mosquito saliva contains allergens such as proteins. When a mosquito bites the skin, these allergens enter the body and trigger an allergic skin reaction, causing local redness, swelling, and itching. 2. Toxin invasion: After a mosquito bite, toxins secreted by the mosquito may remain in the skin. The irritation from these toxins can lead to symptoms such as itching and swelling. 3. Insect bite dermatitis: This is a localized allergic and inflammatory skin reaction occurring after insect bites, characterized by sudden appearance of red patches, often accompanied by intense itching. For this condition, some relief measures can be taken, such as using antihistamines or applying anti-itch topical ointments. At the same time, keep the bitten area clean and dry, and avoid scratching to prevent infection. If the itching persists or worsens, it is advisable to seek medical attention promptly.