Any home remedies for alleviating swollen feet, from a medical condition?

My partner has Lupus (SLE) – Lupus Nephritis. She was on a maintenance drug called Imuran, which she was taken off of when the flare up occurred (explained in the next paragraph).

In the last 4 months, she’s had a flare up and was put on different medications. Her left foot/ankle has started to swell up in the last 2 days. Yes, she has talked to her doctor about it. We are to keep an eye on it for change in colour or further swelling (the doctor was concerned because it’s only one foot and that it may be a blood clot).

Anyways, she forgot to ask how to help alleviate the discomfort and pain from the swelling, if possible. I’d like to leave her a note in the morning, before she goes to work, so she can try to ease the condition throughout the day. I hate seeing her in pain.
So far, all I’ve found through internet searches was to drink lots of water and rest the foot above her heart. She wanted to know if I should try to massage it – but it is painful to touch.

If the condition was caused by a blood clot, will she still be able to alleviate the swelling (even if by a small amount)? Or would the clot have to go away on its own first (presuming it’s not a large one)?

I’m going to give a list of her medications. I don’t know if the medication will make the attempt at alleviating the condition futile – I’m hoping someone else may know more. We don’t think the medication is causing the condition though.

She is currently taking (per day):
Prednisone – 7.5mg (down from 30mg a couple weeks ago).
Cellcept – 1000mg
Coversyl – 2mg (blood pressure).
Etidrocal
Vitamin D

Thank you for taking the time to read my question. And, yes, I have her full approval to post this information. :)