My child has dry skin since he was born, I try to moisturise it as much as possible his skin doesn’t take well with a lot of creams either or baby oil coconut oil is fine thankfully. But I noticed this patch on his leg today I don’t think he itches at it I haven’t noticed him doing that. Is this just a dry skin patch and j need to moisturise it more? Or could it be ring worm he’s never had anything like this before.