Girls, hello everyone. My daughter had a fever yesterday evening, her …

Girls, hello everyone. My daughter had a fever yesterday evening, her condition was good, which I was very surprised about because she usually has trouble even with 37.0. So I put her to bed. In the middle of the night she woke up, started crying, lowered the temperature with ibuprofen. In the morning she felt good, she went out normally all day, now in the evening it's rising again. I don't know what it could be?