The most common cause of Morton's Neuroma is wearing high heeled shoes or tight shoes that put a lot of pressure on the front of your foot. It is due to discomfort and compression of the nerve between your third and fourth toes.
Other foot problems like bunions, flat feet, or hammertoes can also contribute to this by changing how weight is distributed in your foot.
Morton's Neuroma is not actually a tumour, but rather a thickening and swelling of the tissue around the digital nerve leading to the toes. This can cause a lot of pain and discomfort, especially when you're active.
Morton's neuroma orthotic insoles, from Footlogics can help with the pain by reducing the pressure on the affected nerve.