My laptop fan stays on high constantly

I am wondering why my laptop fan may be staying on high all of the time. I know that my Apple laptop is properly ventilated so it isn't overheating and I'm not doing anything incredibly heavy on it that would cause the fan to be on so much. I'm concerned there may be another issue I'm missing. I did try working in another area thinking that the ventilation may be the problem but it persisted. Assistance is appreciated.
