Fever, cold, and cough in children are most commonly caused by viral infections, and in many cases, the symptoms improve gradually with rest, fluids, and supportive care. Kofarest syrup is usually given to help reduce cough and mucus, while Sinarest may help relieve fever, cold symptoms, and nasal congestion. These medicines can provide temporary symptom relief when used in the correct dose for the child's age and weight, but they may not cure the infection immediately because most viral illnesses take several days to improve naturally. It is important not to give medicines too frequently or in incorrect doses, especially in young children, without proper medical advice. Make sure your son drinks enough fluids, gets adequate rest, eats light, nutritious food, and avoids cold drinks or exposure to dust and smoke. If the fever is mild and the child remains active, playful, and able to eat and drink, you may continue monitoring at home. However, you should consult a doctor if the fever lasts more than 3-5 days, the cough becomes severe, breathing becomes fast or difficult, the child develops wheezing, vomiting, poor feeding, unusual sleepiness, ear pain, or if the symptoms keep worsening despite medicines. A doctor may then examine the child to check for throat infection, chest infection, allergy, or another cause. Proper evaluation is important because repeated or prolonged cough and fever may sometimes need a different treatment approach.