White bumps on skin

[ClockWatchingLady]

DD (3 yo) gets these on her arms and face after being in the sun. They look almost like hives, but don't go up and down in the same way (can last a good couple of days, after which they just disappear without trace). Any ideas?
Many thanks for reading.

Heat rash? Try a 50 factor suncream, see if it makes a difference. The lanolin free ones are better as if your sun sensitive the lanolin can agrivate it.

Thanks for your reply Mhysa. I did think about heat rash, but read that that would be more likely to look like small red spots rather than larger white bumps. Yes, maybe I should see whether a bit of suncream helps - I generally don't use it (just make sure they're not out in very strong sun for too long at a time), but might be worth a try.
Thanks again.