4 months baby having rash and itching 2 months.. sir please advise

A 20 days fem baby having these lesions...plz spot and diagnose..

8 year old boy with these itchy papules over upper limbs, lower limbs, neck, face, body since 5 days, wt is d condition?

Fever,rash,since 1 month,taken amox but no relief,plz interpretate thanks

This rash 3yr old male. itchy progressive.diagnosis and treatment please