Most likely: chronic eczematous dermatitis with lichenification, also called lichen simplex chronicus. The dry, thickened, darkened, scaly skin around the wrist suggests a repeated itch-rub-scratch cycle. Because the area is directly under bangles/bracelets, allergic or irritant contact dermatitis from metal, dyes, fragrance, soap, or friction is a likely trigger.

A photo cannot exclude tinea (ringworm). Some of the small ring-like scaly spots mean a clinician should examine it and, if uncertain, do a quick KOH skin scraping before using a strong steroid. Tinea corporis is confirmed by KOH examination of skin scrapings. Andrews' Diseases of the Skin E-Book Clinical Dermatology, lines 1950-1952.

Important: avoid starting a potent steroid or steroid-antifungal combination cream without assessment. Steroids can temporarily mask and worsen an untreated fungal infection.

Please arrange a dermatologist or primary-care visit, especially if this has lasted more than 2-3 weeks, spreads, keeps recurring, or fails to improve after removing the jewelry and moisturizing. Seek prompt care if there is warmth, pain, swelling, pus/yellow crusting, fever, or rapidly spreading redness.