Investigation
an x ray is sufficient to rule out the bony deformities or fracture. But when the x-rays are normal MRI or CT scan are needed to look for other abnormalities. Sometimes special test like NCV and color Doppler or angio is needed for charcots related arthropathy.
Treatment
(in general )- need to be individualized depending upon the severity of pain and other comorbid condition and nature of work
Night splints
A night splint may be fitted to the calf and foot and kept on during sleep. This holds the plantar fascia and Achilles tendon in a lengthened position overnight and stretches them. But it is best to consult a medical professional before using them.
Surgery
A sore heel will usually get better on its own without surgery if you give it enough rest. However, many people try to ignore the early signs of heel pain and keep on doing the activities that caused it. When you continue to use a sore heel, it will only get worse and could become a chronic condition leading to more problems like structural changes. Surgery is rarely necessary and it is reserved for the structural abnormalities when other modalities of treatment does not work.
Note:- always consult your doctor before starting treatment of your own. this is for the gross knowledge regarding heel pain only.