Does a fan blowing on you when you have a cold cause harm?

A fan blowing on you when you have a cold generally does not cause harm, but it can exacerbate certain symptoms like a sore throat or congestion by drying out the air and irritating your nasal passages. It's important to stay hydrated and use a humidifier if the air is dry. If you find the fan uncomfortable, it's best to avoid it while you're recovering. Ultimately, listen to your body and do what feels best for your comfort.