Hello, I am 31 years old. I am female, I am slightly overweight (5 0 and 200lbs) and drink and smoke cigarettes. I have been dealing with swelling of both my legs from the knees down, hard time standing for a long time, my hands shake, and I have pain in my lower back. also, I am constipated all the time. no vitamins or prenatal pills or iron or anything that would cause this. I don t know what is causing it.