Hello,
Arch pain commonly occur due to
injury to the plantar fascia. There can be other causes of such symptoms like ligament sprains, muscle strains, poor biomechanical alignment,
inflammatory arthritis,
stress fractures, overuse, etc.
You are suggested to get clinically examined by a GP. The GP will test the nerves of the foot, muscle function tests (you will be asked to run, walk or jog, etc), X-ray, MRI, bone scan of the foot and arc will be done.
Physical therapy is helpful, it reduces pain and increases circulation to promote healing. Treatment will depend on the pathology deteted.
Custom fabricated
orthotics or off-the-shelf orthotics may helps to relieve the symptoms. Exercises under a physiotherapist will help to increase the strength and stability of the affected area. You can take anti-inflammatory medications to reduce the pain. The MRI will help to detect the knot on foot & will be treated accordingly.
Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K, General & Family Physician