what causes blockages of ducts in the body? I seem to be acquiring cysts through out my body. Last year I had a cyst removal from my breast. I now have a cyst on my thyroid 2cm unwanted weight gain approx. 10 lbs my weight fluctuates. I can wake up in the morning and to my surprise I have put on three lbs while I slept. My throat bothers me a little horse at times. I m fatigued, vision is blurred, I feel lightheaded and have swollen fingers, puffy eyes. Most of these symptoms have developed quickly over the past two months. Another new issue I have been dealing with is low blood sugar my Doctor prescribed metmorfin but I have decided to go on a no carbs high protein diet . I exercise I eat healthy and cannot rid myself of this unexpected recent weight gain. I am female 61 old and have been very healthy and active all my life. My Doctor has no immediate plane to remove the cyst on my thyroid unless it grows bigger and becomes bothersome. I do take medication for high blood pressure and a fluid pill. Recently I was on a cholesterol drug for three years but my Doctor had me stop taking because of leg pains. thank you for your time.