My daughter is 16 months old. She is having fever since last 2 days which is less or negligible in the morning and afternoon hours, but increases at night. It reaches till 103° and we have to give one dose of Meftal syrup (2.5ml). Post which it decreases. It worked for the first night but the fever on the second night rose again after 1.5 hours of the dosage. What can be the possible reason of the fever? There have been some change in weather, but she doesn't have any symptom of common cold such as running nose or cough. Please help.