Is this a matter of physical fitness or is it caused by something else?

Patient's question:

Fear of cold, excessive sweating at night while sleeping, prone to catching colds, have not been treated, want to know what symptoms this belongs to

Doctor's answer:

Create a regular lifestyle to ensure a consistent daily routine. At the same time, develop good habits of physical activity to keep the body flexible and strengthen immunity. Exercise is good for health and boosts immunity. The habit of exercising can be cultivated starting now, beginning with small steps and integrating physical activity into the details of daily life. Additionally, pay attention to a balanced diet with a proper mix of meat and vegetables, avoiding fried and grilled foods. Drink plain water instead of sugary beverages. I hope this helps you.