Diaper rash treatment

dear dr one of my pt used this sleekwax strip afer she had dark pigmntion around left side mouth pleas suggest me medicine not having itching

52 year old man having disease from 6 months,what might be the cause and treatment???

a 25y/m c/o-only itching present plz suggest ur opinion

middle aged male having these leison ,painless since 10 days discreet over forearm and knee ,dx ?

23yr male with such lesions over the trunk associated with itching sometimes since 2 to 3 months. No other significant history. kindly opine