Thanks for writing your query.
After reading your post, it seems that there might be a possibility of an insect bite.
Ice application will lower the pain but you should also follow some other precautions like applying baking soda over the marks.
You should also take an antihistamine like Fexofenadine
180 mg once a day.
Antibiotic along with painkiller will be needed if it result in cellulitis
I hope this is helpful to you.