I think you are suffering from keratosis pilaris...and can do treatement at home..Home remedies for keratosis pilaris are...
*First I use a thick loofah sponge or buff-puff on the affected areas. I do this daily and I only use Dove Nutrium Body Wash with my sponge. I have tried several moisturizing body washes, and this one has proven to be the best for me. It is a dual formula that contains a gentle cleanser and a moisturizing lotion at the same time. It works great. When using the sponge, scrub as hard as you can on the affected area, and in a circular motion. Exfoliation is very important, especially since the affected areas are so dry.
*After I exfoliate with this body wash, I then apply an over the counter lotion that has worked wonders for my keratosis pilaris. Neutrogena makes this lotion and it’s called “Multi-Vitamin Acne Treatment”. I know what you are thinking; keratosis pilaris is not acne. No it’s not, but for some reason this stuff works. In my reading and research on the subject, I ran across a treatment that recommended using a moisturizer that contained a small amount of salicylic acid. This product contains both. It is full of vitamins and moisturizers that are great for your skin, and it also contains this salicylic acid. If you apply this lotion right after you have scrubbed with the Dove Nutrium, it will give you results within 2 or 3 days
*Adding a humidifier in your bedroom will also help to clear your skin. The moisture will hydrate your dry skin while you sleep at night and help in clearing up the keratosis pilaris.