How Large Can Mosquito Bites Get?

Usually, mosquito bites are small and harmless. However, a bite from an infected mosquito can cause a severe allergic reaction. These reactions can include itchy, blistering lesions. In rare cases, a bite can result in anaphylaxis, which is a life-threatening reaction.

A normal-sized bite is generally less than a half inch in diameter. It is an itchy, red bump that usually lasts a day or two. It may also turn into a large, welt-like skin lesion. These are common in children, but adults are less likely to experience an allergic reaction.

If you are itching from a mosquito bite, it is a good idea to wash your hands with soap and water. It may be helpful to apply a cold cloth for a few minutes to help stop the itching.

If the bite does not heal, it is a good idea to seek medical advice. Doctors can use antibiotic ointment to treat infected bites. Using a cold pack can also help relieve the swelling.

A bite from an infected mosquito can carry viruses and parasites. It is also a good idea to avoid areas that are often infected with mosquitoes. Using insect repellents is a great way to prevent the bites. The American Academy of Allergy, Asthma & Immunology (AAAAI) recommends products with 6 to 25 percent DEET. These products can provide up to six hours of protection.

If you are worried about an allergic reaction, you should see your primary care doctor for medical treatment. You may also want to take nondrowsy antihistamines.

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