[YokoZar]

Should they also consult a doctor before going outside?

There are a lot of risks to being in UVB light too much, but excess endogenous Vitamin D production isn't one of them.

[paulcarroty]

There's a risk to get a skin cancer, so its very serious.

Better to eat oranges and go outside as much you can: balcony/roof/near private home etc.

[rapsey]

So is spending time in the sun without sunscreen.