Did you have an xray which showed a heel spur? Heel spurs and plantar fascitiis are treated basically the same way unless the heel spur is so big it is causing extreme discomfort then surgery is an option.
you should make sure you have good supportive well fitting shoes, orthotic inserts may help, cortisone injections will decrease the inflamation you are experiencing. The fascia which is the tissue just under the layer of skin on the bottom surface of your feet can get inflamed........without a heel spur in the picture its just called plantar fascitiis, .......having the heel spur can cause the fascia to get inflamed, ............some more suggestions, are some strengthening and stretching exercises for your feet/ankles........you can take a soda can put it on the floor put your foot on top and roll it with your foot, you will feel the stretch...........ok......anti-inflammatories, such as motrin, ibuprofen etc.......high dose, prescription strength for a couple weeks to get the inflammation down,.......
if these things dont work your doc can put you in an immobilization boot for about a week or so, this usually lets the tissue calm down and helps decrease the pain.
but the cortisone shots usually will work wonders,
its all a matter of first getting the inflammation taken care of, which will lessen your pain, then dealing with the reasons it got inflamed in the first place, and if you do have a heel spur orthotics will usually help.
hope this all made sense!