How to manage papular urticaria post-insect bite in kids?

Hello doctor,

This query is regarding my baby boy’s health. He is 18 months old and recently had his varicella shot last month. Last week, he suddenly started shouting in the middle of his sleep and kept scratching his forehead and neck region. When checked two mosquitoes were near him and had bitten him.

Generally, he gets papular urticaria after any insect bite. But after three days, he got lesions all over his face, arms, and legs. Checked with my doctor and initially, it was ruled out as chicken pox along with insect bite allergy. But even after a week he still did not show improvement. The older ones are very slowly recovering. But every day new lesions are coming up and he scratches like anything despite a lot of medications. Please help. His current medications are Aciclovir half a teaspoon (completed the 5-day course), Azithral one teaspoon (night only) for seven days, Xyzal half a teaspoon thrice daily. Now the doctor has started him on Omnacortil steroid medication and Kid Pred 3/4 teaspoon twice daily.

Please suggest if we are treating him the right way. He weighs 23.15 Ibs. No fever, cold, or body pain symptoms.