For most simple insect bites, you do not need to see a doctor.
But. You should see a doctor about an insect bite if you experience any of the following symptoms:
Infection
You have pus, increasing pain, swelling, or redness around the bite. You may also have red streaks leading from the bite, or a fever.
Allergic reaction
You have a rash, hives, itching, or swelling away from the bite. You may also have mild belly pain or nausea.
Other symptoms
You have a large area of swelling around the bite, such as your entire arm or leg. You have symptoms that don’t improve within a few days. You were bitten in your mouth, throat, or near your eyes. You have joint pain, swelling, and a rash several hours after the bite.
You should call emergency services if you experience wheezing, difficulty breathing, nausea, vomiting, or diarrhea after a bite