Unsmooth and grainy legs may be a case of perifollicular keratosis, which can be treated with retinoid medications and topical fruit acids.
Keratosis pilaris is usually characterized by follicular keratosis pilaris with varying degrees of perifollicular erythema on the face, upper arm extensors, thighs, and buttocks, and has a childhood onset that resolves in adulthood.
Patients with keratosis pilaris need to avoid over-drying the skin and use mild bathing products. Topical treatment may include emollients, retinoids such as tazarotene and adapalene, or keratolytics such as hydroxyacetic, salicylic, or malic acids.
Legs are not smooth with granularity may also be allergic dermatitis and other causes, should be timely to the hospital, clear cause of the disease after the development of appropriate treatment plan, so as not to delay the condition.