What’s wrong with the rough, grainy skin on my neck that looks like chicken skin?

Neck skin roughness has a granular feeling like chicken skin to consider is the keratosis pilaris, seborrheic keratosis, small spiny lichen planus, molluscum contagiosum and so on.
1. Keratosis pilaris: Keratosis pilaris is a chronic follicular keratosis skin disease, the pathogenesis is not completely clear, considered to be hereditary, vitamin A deficiency, metabolic disorders and other reasons, the typical performance of the follicle keratin plug or with the follicle consistent with the keratinized papules, the skin like chicken skin. The skin lesions will be more obvious in adolescence, and the symptoms will be relieved in adulthood.
2. Seborrheic keratosis: Seborrheic keratosis is a benign tumor of the epidermis, also called basal cell papilloma, commonly seen in the elderly, related to skin aging, starting as a light brown spot, then gradually enlarged and elevated as a flat papule or plaque with a rough surface.
3. acanthosis nigricans: the pathogenesis of acanthosis nigricans is not particularly clear, it may be related to vitamin A deficiency, or it may be a variant of perifollicular keratinization, this disease is common in children’s main manifestation is the follicular keratosis papule of the size of a needle tip.
4. Molluscum contagiosum: It is a relatively common benign skin tumor, which may be related to skin aging, hormone level changes and other factors. It can be manifested as a small raised sarcoma.
Neck skin roughness like chicken skin may have other reasons, should go to the hospital for a detailed examination, for the cause of the symptomatic treatment, usually pay attention to keep the skin clean and hygienic.