What to do if you notice a foot problem
If you notice any of the above problems, you should seek medical advice straight away. However, in the meantime, you should take the weight off your foot.
Contact your GP or your foot protection team immediately, and if they aren’t available, then go to your nearest out-of-hours healthcare service.
A small complaint with your foot can become serious very quickly if left untreated. For some people, a serious foot problem can escalate to needing an amputation very quickly, so you must not delay in seeking medical help.
source: express.co.uk