Loading... siana26158663. If you have too much vitamin D in your body, your may feel nausea, vomiting, weakness, bone pain and weight loss. A long-term effect of too much vitamin D is the deposit of calcium in soft tissues of the body including the blood vessel walls and kidneys where it can cause serious damage.ou can get problems with vitamin D from too much exposure to the sun. I hope this helped. Reply. Loading... joyce stout. cindee wrote: I know that deficiency of vitamin D may cause many problems in your body, but I didn’t know that too much vitamin D also can do you harm.