I have had toenails fall off over the last three years, they are not painful, they lift at the nail bed and slowly loosen to the top until they fall off. Also I have started having heart flutters in the last month. I take Levoxyl fot hypothyroidism, could any of this be related or signs of an underlying disorder>I am 41 yearsold and ay a healthy weight and am physically active
I don't think the toenails falling off are related to the heart fluttering sensation, but it COULD be related to continued hypothyroidism.  Go see your doctor, and check your thyroid levels to make sure your Level dose is correct.  Too little can affect the hair and nails, too much can cause arrhythmias and heart fluttering. Alternatively, a common cause of toenails falling off is a fungal infection of the toenail beds.  If the blood work is normal, your regular doctor or a dermatologist would recognize if there is a fungal infection and treat you with the proper antibiotic pill or topical antibiotic cream.  Severe and prolonged toenail fungal issues would likely require a long course of an antibiotic pill, such as Fluconazole, but that requires blood work and a doctors' supervision. Good luck, and let us know what happens.