Noticed yesterday and today that my daughter is urinating little and s…

Noticed yesterday and today that my daughter is urinating little and sweating a lot, although at home the usual temperature, not covering, walks in T-shirts and shorts or in leggings. On Monday, the temperature rose twice sharply to 37.5 and all of it was gone, phlegm for a couple of days were and everything passed. Usually, this happens after a previous cold, but something is worrying me, decided to ask if your children have such things?