I went to a city break for about 4 days a month ago. Walked a lot, was in trainers but on cobbles. Did about 10 miles each day. It caused me to have a blister on the ball of my foot - it was raised a bit and full of blood for a day but then flattened out and gave me no trouble. I have had one in the same spot before but never as dark red. 4 weeks on, it's still there. Not troubling me but looks unsightly.
It's completely flat but the skin is very dark red/black. No pus etc. I have tried using a foot file and foot scrub thinking it was just dyed layers of skin but it isn't shifting.
Any ideas to help it on its way?