3yo with chilblain

[Highlandbird]

My 3yo DS has what I'm pretty sure is a chilblain on his big toe, he has been complaining of cold feet when we have been out in the snow (we've had snow here a few weeks now) and we've been having a bath when we get it to warm up so I'm thinking that's probably what caused it?
I've never had them, no idea how to treat it or shall I just leave it alone? I'm assuming he doesn't need to see the doctor unless it looks infected?

are you sure it isnt a verruca?

I'm pretty sure, it's a purplish patch, looks too big for a verruca. What do you think?

Looks like a chilblain. Not much to do except keep him warm so it doesn't get worse. They clear up after about a fortnight. Have you got him welly socks to keep his feet warmer?

I had chilblains as a child - usually on the top of the toe, went red, swollen and bloody hurt....

under a toe would be more likely to be a welly rub...

If it is a chilblain, if it cracks or swells go see a doctor, otherwise find a way to keep it warm.

He does have welly socks but doesn't always wear them.....will make sure he does from now on. I should get him proper winter boots, kids wellies aren't great quality, mine have neoprene lining but his don't so probably not very well insulated.....and it's reeeeaaaaaally cold here just now. Will keep his feet warm and keep an eye on it, should it put any cream on? DH put sudocreme on last night.