My child is 6 years old. Whenever they have a fever, they experience muscle cramps. How can I prevent this?

Patient's question:

Age 1, around half past midnight yesterday night 2, temperature 39 degrees 3, from last night to 1:30 PM today

Doctor's answer:

Analysis of the condition: This may be caused by a viral cold, primarily due to a weakened immune system and viral infection.
Suggestions: For a viral cold, if you have a fever, take paracetamol. If you have a runny nose, take Puermin. For viral colds, taking something like Viraline and vitamin supplements can help. Pay attention to a balanced diet with sufficient nutrition, avoid picky eating, and spend more time playing outdoors. Buy some first-aid medications at home.