Neuromas are not so common on the first toe. Esp on both feet at the same time.

Mostly they come from wearing too tight of a toe box in the shoes.
And occur between the 3rd and 4th toe.

I'd hold off on any surgical suggestions for now. Once you are cut in the feet, things really don't go back to baseline. I think there is always a "loss" or tradeoff.

Take a look at your shoes too. If they flex too much they will push on that area of your foot with each step. I gave up leather many years ago as my sesamoids started to give me pain.

My foot doctor told me to get a wider shoe and more open toe box. So sometimes I wear men's athletic shoes, and always with a nylon upper, never leather. There is a photo on that link I gave you of a shoe being squished showing what to avoid...it is somewhere on that complex site, at NorthCoast Foot Care.
Look at any shoe which a wide strap across that part of your foot too. Pay attention to times of less pain, and which shoes you wore that day, etc. I would think any high heels might have to go.

I was having some hammertoes, and once I got the new wider shoes, they went completely away! The magnesium helps that too.

Looks like your B12 is okay....do you have the concentration... because labs in Europe may report in different terms. mmols/L would have to be converted. I thought that Britain was now using ng/L which is the same as pg/ml. But if it is in mmol/L we have to convert it.