If a patient has swollen feet without pain, this may be a side effect of some medications, such as calcium channel blockers, such as nifedipine, amlodipine, and felodipine, and some patients may develop ankle edema without pain after taking this type of medication. In addition, patients with heart failure, for example, may also experience lower extremity edema without pain. If the lower extremity edema is caused by heart failure, it should be combined with diuretic therapy for better relief. If the lower extremity edema is due to medication, it is likely that the edema will improve more significantly after stopping such medication. In addition to calcium channel blockers, hormonal drugs and licorice drugs may also cause swollen feet.