This is understandable that you are anxious about the itch.
Scabies and it's hypersensitivity reaction does take some time to resolve.
Take it that you have been treated by a Qualified Dermatologist 🙏
Don't worry it will get better soon but best to send some pics and connect ASAP.
For further in depth discussion and quick resolution, please do connect via this App's INSTANT ONLINE Consultation 🙏
Health Tips
Use some coconut oil or Moisturizer on the area to help calm the skin down.
Antihistamine like Levocetrizine or Fexofenadine will be useful.. at 14 he will be oK with the adult dose once daily.
Good Luck and Godspeed 🙏