Mosquitoes
Combating mosquito bites: symptoms and treatment
Content Updated: March 17, 2026
Key takeaways
- Mosquito bites typically appear as inflamed, roundish red or white welts and can cause minor symptoms like swelling, redness, and itching.
- Severe allergic reactions to mosquito bites, known as "skeeter syndrome," can result in significant swelling and discomfort, and in rare cases, may lead to anaphylaxis.
- Mosquitoes are vectors for several diseases, including West Nile Virus, dengue, and Zika, so monitoring symptoms is crucial if you experience severe reactions.
- To minimize the risk of mosquito bites, it's important to understand what attracts mosquitoes and to take preventive measures when spending time outdoors.
Jump to section:
What does a mosquito bite look like?
Diseases transmitted by mosquito bites
Home remedies for mosquito bites
Warmer weather means more time outside, but it also means more pests. One of the most bothersome insects that emerge when the temperatures begin to rise is the mosquito. These flying pests are notorious for biting humans, and their bites are often itchy, sometimes even painful.
While mosquito bites might not be completely avoidable, there are some things you can do to reduce your risk of being bitten. Before you head outside to enjoy the fresh air, learn everything you need about mosquito bites.
What does a mosquito bite look like?
Mosquito bites typically appear almost immediately after a bite occurs. This is one of the distinguishing factors between these bites and other bug bites, such as bed bugs. What a mosquito bite looks like can vary from person to person, but for most, mosquito bites are usually inflamed, roundish, and white or red in color. Some may have a small dot in the center.
Bites may have oddly shaped edges, as well, rather than perfectly round ones, and they may be scattered
Mosquito bite symptoms
Minor reactions to mosquito bites generally include:
- Swelling
- Redness
- Itching
Children, people with compromised immune systems, or those severely allergic may experience more severe mosquito bite symptoms, including:
- Large areas of swelling and redness
- Low-grade fever
- Hives
- Swollen lymph nodes
Minor reactions typically resolve within a few days, but severe reactions may last longer. It's important to monitor symptoms closely, especially if you have a known allergy to mosquito bites.
Allergic reactions to mosquito bites
Allergic reactions to mosquito bites can vary in severity. “Skeeter syndrome” refers to a localized reaction with significant swelling, redness, and itching at the site of the bite. This reaction is generally mild but can be uncomfortable. In more severe cases, individuals may experience mosquito bite symptoms such as hives, difficulty breathing, or anaphylaxis, which is a life-threatening response requiring immediate medical attention.
Does a mosquito bite bruise?
While mosquito bites don't typically tend to bruise they may develop dark spots that resemble bruises. Depending on the person, mosquito bites may develop hard, itchy bumps or small blisters.
Diseases transmitted by mosquito bites
Unfortunately, mosquitoes may carry pathogens that can cause diseases in humans. The most common mosquito-borne illness in the United States is the West Nile Virus. However, mosquitoes can also cause other illnesses like eastern equine encephalitis (EEE), dengue, chikungunya, and Zika (although not all these diseases are currently found in the U.S.). Some common symptoms of mosquito-borne diseases are:
- Fever
- Headache
- Body aches
- Fatigue
- Skin rash
- Joint and muscle pain
Why do mosquito bites itch?
The culprit behind itchy mosquito bites is the insect's saliva. A mosquito bites you by inserting a straw-like structure into your skin and sucking out a tiny amount of blood. While biting, the mosquito injects some of its saliva into your skin. Your body's reaction to the saliva is what causes the bite to itch. Reactions to mosquito bites vary by person; some find them only mildly itchy, while others require treatment for a severe itch.
Why do mosquitoes bite?
You might think mosquitoes exist only to bite you, but this isn't true. Only a small percentage of mosquitoes primarily bite people; most are more likely to go after smaller mammals, birds, amphibians, and reptiles. They will also bite other animals, including dogs and livestock. The reason why mosquitoes bite is actually not for survival. Mosquitoes feed on nectar and plant juices, but blood allows them to reproduce. This means only female mosquitoes bite as they require a blood meal in order to reproduce.
Why are mosquitoes attracted to humans?
Mosquitoes have finely tuned senses, and they use these to detect biological signals that help them locate hosts. Body heat, odor, and movement can all help a mosquito find you, but the actual beacons are the scent of carbon dioxide and chemicals in your sweat. Specific colors, like red, can even attract certain types of mosquitoes, so dark-colored clothing may make you an easier target.
How to treat mosquito bites
When dealing with mosquito bites, it's important to resist the urge to scratch them. Scratching can cause them to become infected, which can result in redness, warmth, and sometimes a red streak spreading from the bug bite site. To get rid of mosquito bites, the Center for Disease Control (CDC) recommends over-the-counter anti-itch or antihistamine creams such as calamine lotion. Most mosquito bite symptoms will resolve on their own in a couple of days. However, if the bites are accompanied by headache, body aches, fever, or signs of infection, it is best to seek medical treatment.
Home remedies for mosquito bites
If you don't want to use an over-the-counter cream, there are a few home remedies for mosquito bites. These include washing the area with soap and water and applying an ice pack to help reduce swelling. You can also make a paste using one tablespoon of baking soda and a small amount of water.
Apply the paste to the bug bite and remove it after about 10 minutes to help reduce itching.
How to prevent mosquito bites
One simple way to avoid the discomfort of mosquito bites is by taking preventive measures. By implementing a few easy tricks, you can keep those pesky bugs at bay and enjoy your time outdoors with ease. Here are some personal prevention measures to help you prevent mosquito bites:
- Use mosquito repellent as directed on the label. It’s best to choose a repellent that has DEET, Picaridin, or oil of lemon eucalyptus (OLE).
- Wear long sleeves, long pants, and socks when spending time in mosquito-prone areas. Light-colored clothing is less attractive to mosquitoes.
- Treat boots, tents, and other gear with permethrin to provide extended protection against mosquitoes as directed by the product label.
- Use oscillating fans when congregating outdoors. Mosquitoes are weak fliers, and the strong currents may offer additional protection.
- Install netting and screens around porches and patios to prevent mosquito entry altogether.
If you have a large mosquito population around your house, you may need more intense treatment, such as residual sprays and other methods used by pest control professionals. Don't spend your summer scratching mosquito bites — call Terminix® today. Contact us today to learn more about our mosquito control services.
