Hot-and cold-water therapy can be effective in treating foot pain. The hot treatment will promote blood flow, and the cold treatment will reduce inflammation. Fill one bucket with cold water and another with bearable hot water. Sit in a comfortable chair, dip your feet in the hot water for three minutes and then do the same with cold water for at least 10 seconds or up to a minute. Repeat the whole process two or three times and end with cold foot bath.

Vinegar is used in various treatments and can help with foot pain due to sprains or strains as it reduces inflammation.

Fill a tub with hot water. Add two tablespoons of vinegar in it. You can also mix sea salt or Epsom salt in it. If you do not have any of these, just use table salt. Soak your feet in it for about 20 minutes.
Alternatively, put a mixture of equal amounts of vinegar and water in two containers. Use cold water in one and hot water in the other. Soak a towel in the hot mixture, squeeze out the excess liquid and then wrap it around your foot. Leave it wrapped for five minutes. Do the same using the cold mixture. Repeat the whole process at least three or four times daily.