What is the diagnosis

history of itching behind lft ear for the past one week.

nodular swelling in nose since 1 month at the site of nose ring...no pain....no pus.....

19 ys old male with gradual onset of these ... ? He has no other complaint. What's ur Dx & Rx ?

such scaly lesions over upper n lower extremities except face, hereditary,appears only in winter fade away in summer, no itching,

25 year female with H/O itching and characteristic lesions on back and on both legs since 3 weeks. Diagnosis?