This condition of blisters after being bitten by insects is usually clinically known as insect bite dermatitis. If the blisters are not very large and the surrounding skin is normal, it is recommended to try not to squeeze the blisters and to take appropriate oral anti-allergy medication. If the blister is large and the tension is also large, it is recommended to extract the fluid from the blister with a syringe as soon as possible, never scratch the blister, and you can apply ointments, such as those commonly used with hormones. Also avoid intake of spicy, stimulating, greasy food, try not to eat seafood, and observe closely. If after the above treatment, the skin around the blister gradually turns to a normal color, you can not be too nervous.