This is a test of commonsense. Complete the next sentence:

How to treat hyperkalemia
Look for swollen feet and ankles.
Examine your feet and ankles when you take off your shoes in the evening. Notice any unusual swelling that does not go down to normal after about half an hour.
This can be a sign of excess blood potassium. Swelling in the feet and ankles tends to be worse at night after you've been on your feet all day.