Is it normal to feel bad after a fever?

Patient's question:

Low-grade fever of 39.9 degrees for 3 days, 38 degrees on the fourth day. After the fever subsided in the afternoon, red rashes reappeared. On the fifth day, the rashes continued to increase and did not disappear or fade. The baby's mental state is very poor. Often crying, very irritable when looking at anything. Seems very uncomfortable. Is this a symptom of pediatric emergency department? What should I do? Onset time: Fifth day

Doctor's answer:

When the rash and fever subside, the child is usually in good spirits and rarely experiences complications again. However, children with weakened immune systems may develop complications such as hepatitis, pneumonia, or viral encephalitis. It is recommended to first take some Spring-Autumn Antiviral Syrup, provide proper care, and if the child's spirits remain poor or they experience loss of appetite, coughing, dry vomiting, etc., seek medical attention promptly.
Care: Ensure the child gets adequate rest, keep the room quiet and well-ventilated, and avoid over-wrapping them with too many thick blankets. Maintain the skin's cleanliness by frequently wiping away sweat from the child's body to prevent them from catching a cold.