From what you’ve described, it may be a chronic follicular issue like keratosis pilaris, frictional folliculitis, or post-inflammatory pigmentation. The rough, bumpy texture and dark spots align with perifollicular keratin build-up and mild inflammation.
Next Steps
I’d suggest you consult a nearby dermatologist for a proper clinical evaluation. Till then you can use a gentle exfoliating body wash with salicylic or lactic acid 2–3 times a week, and apply a urea or ceramide-based moisturiser daily. Avoid scrubbing or using OTC steroid creams.
Health Tips
Persistent or spreading patches may need dermoscopy or biopsy for confirmation—so don’t delay seeking care if symptoms continue.