@kwcoop Haven't heard anyone mention it here on Connect. Some research on it but don't think it has been FDA approved for any neuropathy treatment. Definitely one with risks and adverse side effects for some people so you would want to make sure to discuss it with your doctor first. Here's some research:
-- Methylene Blue: https://www.ncbi.nlm.nih.gov/books/NBK557593/
-- Methylene Blue Application to Lessen Pain: Its Analgesic Effect and Mechanism
-- Adverse effects of methylene blue in peripheral neurons: An in vitro electrophysiology and cell culture study: https://pmc.ncbi.nlm.nih.gov/articles/PMC8165385/