What is the first symptom of a sinus squeeze?

The first symptom of a sinus squeeze typically presents as a sharp pain or wedging sensation above the eyes. This occurs because a sinus squeeze is related to the pressure in the sinus cavities not equalizing properly with the external environment while descending underwater. As you descend, the increased water pressure can cause a blockage in the sinus opening, leading to pain and discomfort. It is crucial for divers to recognize this initial warning sign to prevent further complications, such as more severe pain or potential injury to the sinus cavities.

Diving can affect the sinuses similarly to how it affects the ears, but the specific symptoms of a sinus squeeze will manifest as discomfort in the frontal sinus area, rather than in the chest, the feeling of fullness in the ears, or dizziness and lightheadedness. These other symptoms might occur in different situations, such as issues with equalization or barotrauma affecting the ears, but they are not typically the first indicators of a sinus squeeze. Understanding these symptoms can help divers manage their health while underwater effectively.