27 year female has this type of blackish hyperpigmentation on both arms and around nape of neck since 10-15 years, no c/o itching, no special aggravating factors...What could be the probable DX ???

51 yr female K/C/O DM 2 Blackish pigmentation on back,hand,leg since 1 and half year. Plz suggest Diagnosis and Treatment.

Diabetes mellitus on insulin since long ... spot this black rashes.

A female pt 43 yrs old having this lesion on both hand since 3yrs plz dx nd rx

12yr old female patients that have asymptomatic blackish dark circles around lower lip since 2 yr.back.self cure and recurrence after 2-3months . Please suggest diagnosed and treatment.