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

One year 9 months boy having sever itching and patches over the knee folds and face, scapula region , body .. sir , madam please advise

5 months baby girl skin eruption from 3 month. Please advice diagnosis.

27 yr lady came with lesion.as shown in images.itching and swelling present.gradually it increasing in size.diagnosis and treatment plz??

b'3 months old infant ,playful, active ,no fever. \nScabies ???'