Hello and thank you for your question,
Yes, swelling and bruising on your foot is normal after a fall and trauma. What happens is you have some internal bleeding and, due to gravity while you are not in supine position, it travels down into your lower part of the leg and foot.
There is really not much that you need to do to treat this but if you wish, you can try elevating your leg as much as you can during the day. You can also apply ice to the foot. If there is no pain, you do not need to take any medications.
I hope you find this information helpful. Please feel free to follow-up with any other questions you might have.
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Best wishes and good luck,