Can You Dive With Asthma? Medical Requirements for Koh Tao Diving

Can You Dive With Asthma? Medical Requirements for Koh Tao Diving

If you have asthma and dream of diving Koh Tao's world-class reefs, you need honest information before booking a course. Asthma and diving don't mix without strict medical clearance, and most of the island's ~70 dive schools enforce this requirement seriously. Understanding why—and what you need to do—takes 10 minutes now and could save your life underwater.

Why Asthma Is a Medical Concern for Divers

Asthma is a contraindication to diving because of how it behaves underwater. Asthma causes inflammation and tightening of your airways, which can happen suddenly and unpredictably. Underwater, where you're breathing compressed air through a regulator and can't simply "catch your breath" by surfacing immediately, airway obstruction becomes a fatal emergency.

Picture this scenario: you're 15 meters down on Koh Tao's famous Chumphon Pinnacle, and your airways constrict due to exercise-induced asthma (triggered by exertion in cold water). Your breathing becomes labored, panic sets in, and you need to ascend. A controlled ascent