 [ Symptoms ] i have had post menopausal bleeding blood tinged vaginal discharge and pelvic discomfort for 6 months any thoughts  i sometimes develop an ache in my abdominal area that spreads down to my thighs it is not painful just an achey feeling i have had the achey leg symptom for years  my last period was sept 2011 my doctor felt a fullness on the right side of my pelvic region which was slightly painful upon palpitation she scheduled an ultrasound for next week i take no meds i have no other symptoms any thoughts on the post menopausal bleeding blood tinged vaginal dishcarge and fullness [ Disease ] hypokalemia is a medical term for low potassium levels in the blood potassium is a mineral required by the body – especially the heart – to function properly potassium levels are measured by a simple blood test low potassium levels can be caused by many things including • use of diuretics a water pill • severe or prolonged diarrhea • use of certain antibiotics such as penicillin • excessive vomiting • an eating disorder such as bulimia • hyperthyroidism very high levels of thyroid hormone caused by an overactive thyroid gland a small drop in potassium levels usually is not cause for concern and may not even cause you to experience any symptoms a larger drop in potassium levels can cause the following symptoms • constipation • fatigue • abnormal heart rhythm often experienced as palpitations • muscle spasms such as cramps in your calf muscles if you have low potassium levels your healthcare provider may prescribe a potassium supplement to fix the problem if your hypokalemia is caused by hyperthyroidism your provider may treat the thyroid problem in order to get your potassium levels back to normal