Sitting under a fan after sweating can provide several benefits:

1. Cooling: The cool air from the fan can help cool down your skin and regulate your body temperature, making you feel more comfortable after a workout.

2. Improved comfort: The fan can help dry off any sweat on your skin, reducing the amount of moisture on your skin and improving comfort.

3. Improved circulation: By blowing air on your skin, the fan can also improve circulation, helping to distribute heat and sweat evenly throughout your body.

4. Reduced risk of skin irritation: By reducing the amount of moisture on your skin, the fan can help reduce the risk of skin irritation and chafing, especially if you have sensitive skin.

It's important to note that while sitting under a fan after sweating can provide many benefits, it's also important to use it in moderation. Directly blowing air in your face for extended periods of time can cause discomfort, and in extreme cases, it may dry out your skin or eyes. It's best to adjust the fan's direction and speed as needed to ensure you stay comfortable.