28 years female itching pigmented rounded patches on both legs since 1 year points favour to right diagnosis ? investigations and differentials?

40 years old non diabetic female presented with lesions as depicted in images over hands, hip, feet ,abdomen and a scalp with itching. The lesions look crusty .Initially I thought they were psoriasis but now since the lesions have spread and crusty in nature, what could be the diagnosis and also management, because I'm unable to arrive at the diagnosis .Will skin biopsy help? Please guide me with proper treatment as eell

Pt aged 21yrs with c/o itching and hyper pigmented lesion over the both UL and LL since 15yrs

A 50 yr old man came with these lesions on his scalp. Total duration was 2 years. Initially started as few papules but later spread to invoke a larger area and also to the dorsum of the right hand. Usually asymptomatic but rarely itchy. No similar lesions elsewhere. Diagnosis and management?

17 years/f suffring frm sever itching and its spreading.....dx and traetmement plz