What are the causes of radiating pain in the first metatarsal?

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It will be better if your age, other conditions, profession, recreation, alcohol intake and dietary pattern are known. The causes can be divided into two major groups.

1. Group 1: Based on anatomic problems like toe deformities, Morton's metatarsalgia, length and mobility issues, improper footwear, stress fractures, arthritis, etc.
2. Group 2: Biochemical issues like hyperuricemia, osteomalacia, osteoporosis, infection, etc. Blood investigations and at the least a plain x-ray of the foot will be desirable before more details can be given.