Can I continue running if I have a fever from a cold?
Generally speaking, you should not continue running when you have a cold or fever, as it may worsen your discomfort. Detailed analysis is as follows:

Cold and fever are natural responses of the body fighting against infections, during which the immune system is concentrating its efforts to combat viruses or bacteria. Running, as a form of strenuous exercise, further increases the body's burden, causing the immune system to become even more fatigued, potentially worsening the symptoms of cold and fever. Additionally, running increases the body's metabolic rate, raises body temperature, and adds stress to the body. This stress may prolong the recovery time of the cold and fever, requiring the body to take longer to return to health. During a cold and fever, the body's resistance is relatively weak. Running may lead to excessive fatigue, further lowering resistance and increasing the risk of complications such as pneumonia and myocarditis.
To promote recovery, running should be avoided during a cold or fever. At the same time, it is important to maintain good hygiene habits to prevent cross-infection to others. After the condition improves, appropriate running can be resumed.