I'm a runner dealing with pf and just healed from heel sf. now my arch has swelling. back of heel still not 100% hurts mostly mid-end of day.

Nonimpact crosstrain: You probably have never gotten over your sf (?Stress fracture?). Plantar fasciits and a stress fracture of the heel are on the same continuum . To avoid hurting your heel you have changed your gait and you are over stressing your mid foot. Get evaluated for a stress reaction, back off your impact activities , and consider running orthotics and cushioning shoe with motion control.

Ice: Orthotics and night splints are a good start. An NSAID if no contraindication can be added. If the stress fracture was confirmed via MRI i would recommend your vitamin d levels be checked.

PF/SF heel pains : As a runner you are undergoing increased ground reactive forces that appear to be concentrating in the heel region. A tight calf muscle/achilles tendon complex can also contribute to this problem. Wearing custom molded inserts may provide a partial solution to this problem by also addressing your foot deformity issue, if that has not already been assessed. Consult with a sports medicine podiatrist.