Welcome yo HCM.
These lesions do sound like flea bites. The first step is to eliminate the cause by killing the fleas on the dog,speak to your Vet about flea treatment(collars, dipping and tablets). The treatment for the bites you already have are symptomatic , using anti-itch creams and anti-histamine
tablets. Natural oils like citronella are also reported to be deterrents for insects biting you.
I trust this helps you.