There are significant differences between a "hot cold" and a "cold cold" in nature. A hot cold is generally caused by significant temperature differences between indoor and outdoor environments, and is common in summer. If it occurs, it can cause symptoms such as dry mouth, reduced urine output, and dizziness.

A cold cold is usually caused by catching a chill, and is most prevalent during the spring and fall seasons. Symptoms of a cold cold include a runny nose, nasal congestion, and others.