My husband and I have suffered with heel spurs for over a year.
Last summer right before our
Disneyland vacation and Mexican cruise it started. It was the most painful thing I've ever experienced. The bad news
is, it took ONE FULL YEAR to get relief. My husband also (we are "relatively" young

).
All I could do last year is take the Advil, have the soft inserts in my shoes, ice the heel at night. Nothing seemed to help. When I got home, I had to try physical therapy for a few weeks.
My husband had so many prescriptions for the pain, he finally gave up.
Our doctor told us it would take about a year to recover, and it did.
My girlfriend is having surgery on her heel spurs (I find this SO weird that
everyone I know has them).
We also found sandals felt better than sneakers to walk.
SO, my suggestion, ice it at night, if wearing shoes, wear soft gel inserts (I got mine from the doctor, my husband bought his at
Walmart by Dr. scholl),
and the anti-inflammatory pills (we take Advil), or get some stronger anti-inflammatory from your doctor.
Sorry for going on...but I feel so sorry for your aunt.
Lucy