M/45 years old patient has whitish and black lesions with severe itching since 3 years please give diagnosis and treatment.

A 35year male complain of dryness itching and crack mark on ankle joint since 1.5year please Dx,andRx

40 Y/O/Female having this type of lesion on both lower limb. duration:1.5 year associated symptom : Itching p/h/o : not significant

20 years Male itching and burning scaly lesions on both legs since 2 months. what is the diagnosis? treatment?

50yr female has been suffering with itching both legs please kindly suggest treatments and daignosis