Hello I have gone through your complaints. It is true that it is an allergic reaction
as your doctor has suspected.
It can be due to bug bite
or simply can be due to crawly. It depends upon the severity of hypersensitivity
. In case of allergic reaction they will have symptoms like fever, cold, cough, noisy breathing, red rash , itching associated with excessive crying.
You need to give antihistaminics to your child an apply calamine
lotion to the site of skin manifestation.
Please kindly take the opinion of your doctor and follow him. You tel him about the abdominal pain
which is another manifestation of allergy.
Thank you. Good day