My 12 year old daughter has recently joined a running club and significantly ramped up her running. In the last week she's moaning about sore heels and achilles pain. I wouldn't have thought that young kids would suffer from this sort of thing. Doctor Google suggests it might be something called Sever's Disease which is linked to kids growing quickly. She's certainly in a growth spurt this year.

Has anyone ever heard of this, is this a thing and if so what would be the best solution to it? I've read that cushioning the heels with silicone cups might work - is this a good idea?

Thanks in advance of your expertise.