I don't think anyone can say whether vitamin d will make your symptoms worse or not. One way you might try to determine that is how do you feel after being outside for a while in the sun taking a walk, at a picnic, etc. You will get far more vitamin di from being out in the sun for a while than you will get from most supplements. That being said I have read some recent endocrine articles where patients with mild calcium elevation were given vitamin d in controlled trials and nothing really changed except their vitamin d levels. the thing that is a little confusing for me is that the vitamin d that is measured in a blood test is the 25OH type. When you have elevated PTH more of this gets converted to the 1,25OH active form of vitamin d and this level is not usually measured since it changes from minute to minute where the 25OH level is more stable. Anyway the 1,25OH is what helps with the calcium absorption

For me I have had high 25OH vitamin d levels (over 80 one time in fact) concurrent with higher than normal calcium and high PTH levels which is not supposed to happen. I also don't have symptoms other than osteoporosis which is common in post menopausal women anyway so it is pretty hard to say what caused it.

So I guess let your experience with how you feel after being outdoors be your guide as to how you might feel taking supplements or you could even just bypass the supplements this time of year and spend more time outside if that is feasible.

Vitamin D is also low in untreated hypothyroidism.

cc22: Getting outside more often can't hurt as long as I'm careful to control my allergies/asthma. I try not to spend a long period of time outside when the pollen count is high. I do know that it doesn't take long outside in the sun to get vitamin D. I do walk. :) It is unusual that your vitamin D is high with high calcium and pth.

bm55: I never new that hypothyroidism could cause low vitamin D as well. I'm on 50mg of synthroid but still have symptoms.