This is a test of commonsense with single/multi-choices. 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.

Possible answers: --Notice plantar fasciitis. Plantar fasciitis, or aptar root rot, is a joint infection that causes a number of joint fractures.. --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.. --Take a step before walking on stairs. If you are taking a walk, use the stairs instead of the elevator.. --Let this fact dictate how much activity you might think your feet and ankles need. If your balance is poor, see if you have headaches..
The answer is:
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.