Brief Answer:
Most possibly, it could be PLANTAR FASCITIS.

Detailed Answer:
Hi, thanks for writing to XXXXXXX

Your symptoms (Pain in the heels after getting up from the bed & pain in the heel after a period of rest) are typically suggestive of Plantar Fascitis. When you are asleep overnight, your plantar fascia tends to tighten up (which is why it is usually most painful first thing in the morning).

This is nothing but inflammation of the Plantar fascia which extends from the sole of foot to the toes infront. Under normal circumstances, your plantar fascia acts like a shock-absorbing bowstring, supporting the arch in your foot. If tension on that bowstring becomes too great, it can create small tears in the fascia. Repetitive stretching and tearing can cause the fascia to become irritated or inflamed.

The management of this condition is as follows -
* Relative rest and simple massage of the foot along with stretching exercises. Regular, gentle stretching of your Achilles tendon and plantar fascia may help to ease your symptoms.
* Use of analgesic antiinflammatory medicines like Advil or Aleve as needed
* Night splints may be useful to keep the foot in plantigrade position
* Shoe inserts - Use of MCR (micronised rubber) or silicon heels (orthoses) in the foot wear so as to produce a cushioning effect and taking off the pain
* Maintaining appropriate body weight so as to reduce the load bearing on the heels
* Avoid wearing flat-soled shoes because they will not provide your heel with support and could make your heel pain worse.
* Quit smoking, if you are a smoker
* At times, a single injection of corticosteroid in to the area of maximum pain will provide good pain relief.
* Extracorporeal shock wave therapy- In this procedure, sound waves are directed at the area of heel pain to stimulate healing. It's usually used for chronic plantar fasciitis that hasn't responded to more-conservative treatments.

Hope I have addressed your query.

Regards

---