feng mo
There's a few ways to curb feng mo.
1. Take anti-hisatamine
If u go see ang mo doc, they'll give u antihisatamine (eg, chlorphenylamine/piriton). It helps to control it. They'll probably give u calamine lotion as well but its useless. Anti-hisatamine is good only while it lasts and after awhile, your body grows resistant to it and it stops being effective (if the feng mo is bad). Usually, for mild cases, it'll subside within few hours.
2. Take steroid jabs
If really bad case, the doc will give a steroid jab but for children, I don't think they'll give that jab.
3. See chinese doc
I think they'll probably give some bitter herbal tea or nothing.
I've had really serious case of feng mo that lasted more than 1 week before and I had to take 3 steroid jabs to control it. IMO, for peace of mind, bring them go see a PD get the antihisatamine aka flu medicine to relief the itch.