Mosquito bites often happen on parts of the body that aren't covered by clothing. Symptoms include: 
An itchy, inflamed bump that forms a few minutes after a bite
A painful spot that looks like a hive and forms within 24 hours after a bite
Small blisters
 A severe reaction to mosquito bites can cause: 
A large, swollen, inflamed area
A hive-like rash
Swelling around the eyes
 Children are more likely to have a severe reaction than are adults.