I have had dry patchy bumps all over my arms for a few years now and their not going away. how can i solve this?

Examination: It would be worthwhile to have the bumps examined by a clinician so you could get a diagnosis and proper treatment.

See a dermatologist: Begin with an exam to define the problem. Any remedy will depend on this. Meanwhile use a moisturizer.

Keratosis polaris: It sounds like a common skin condition in kids called keratosis Polaris. I would suggest trying either Amlactin or LacHydrin (lactic acid) lotion, which you can find OTC. If not improved within 1 month of daily use see your doctor to confirm diagnosis and discuss other treatment.