Hello,
Going by your symptoms,I feel that this type of pain can be due to plantar fasciitis(irritation and inflammation of the tight tissue that forms the arch of the foot),heel spurs,tarsal tunnel syndrome(causes a large
nerve in the back of the
foot to become entrapped, or
pinched), Achilles tendonitis, retrocalcaneal bursitis and arthritis(rheumatoid arthritis, reactive arthritis, gouty arthritis, ankylosing spondylitis, and psoriatic arthritis).