This can be Morton's neuroma. The other possibilities to be considered are metatarsalgia, Intermetatarsal bursal fluid collections, Hammer toe, etc. If the x-rays have not given a conclusive evidence of the other disorders, an MRI is needed for the confirmation of the Morton's neuroma. Read the resources;
Following measures may help you;
1) soft-soled shoes with a wide toe box and low heel
3) ultrasound (iontophoresis, phonophoresis),
4) deep tissue massage, and
5) stretching exercises
You need to take active help of physical therapist for the management.
If these measures are not helpful, you may need surgical excision of the area of fibrosis in the common digital nerve.
Please feel free for your follow up questions.
You are welcome.
Best wishes and kindest regards.