Since standard treatments haven't worked, your chronic heel pain might involve sensitized nerves. For your next pharmaceutical options, a physician may consider neuropathic pain medications such as gabapentin or pregabalin to calm overactive pain pathways. Low-dose tricyclic antidepressants, like amitriptyline, are also highly effective for chronic nerve-related pain. Additionally, topical compounded creams containing ketamine or diclofenac can target the area directly with fewer systemic side effects. Please consult a pain specialist or neurologist to evaluate for conditions like nerve entrapment and to safely discuss these prescription options. There are still excellent avenues available to help you find relief.