Besides affecting your bones. What harm do long term lower dose Corticosteroid use cause?

Many. There are many long term side effects of steroid use. Here are some and the mayo clinic website that discusses in greater detail: Clouding of the lens in one or both eyes (cataracts) High blood sugar, which can trigger or worsen diabetes Increased risk of infections Thinning bones Suppressed adrenal gland http://www.mayoclinic.org/steroids/art-20045692.