Following are the likely causes for your pain;
1) Achilles tendinitis; heel tendon inflammation2) Retrocalcaneal bursitis; bursa are fluid filled sac (pocket like structures) for smooth movement of the tendon, which can get inflamed and termed bursitis. The heel bone is called calcaneum and the bursa below it is inflamed thus the term retrocalcaneal.3) Plantar fasciitis; heel has got a soft tissue underneath called as plantar fascia, inflammation of which is called plantar fasciitis.4) Calcaneal periostitis; heel bone inflammation5) Calcaneal spurs; wear and tear arthritis forms small bone growth.The treatment is almost same for all these conditions with the minor variations. Following may help you;1) Moist heat or ice compresses; whatever suits you2) Anti-inflammatory analgesics like Ibuprofen3) Local analgesic ointment /spray4) Physical therapy5) Deep electrotherapy like iontophoresis, phonophoresis, short wave diathermy, electrical stimulation etc.6) Consideration of steroid shot7) Shock wave therapy 8) Custom-fabricated inserts in shoe-wearThere is a new therapy called as autologous blood injection in which your own blood is injected at the pain site, is said to be quite effective. Shock wave therapy is available in sport medicine clinics or physical therapy clinics. This too is suppose to help in the resistant cases.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
Yes, ultrasound can help this condition.
It is pleasure and privilege assisting you.