Decompression Sickness (The Bends) in Phuket: Signs Every Diver Should Know

Phuket is one of the best places in the world to dive. Boats leave Patong every day for Racha, Phi Phi, and the Similan Islands. Most dives are safe and fun. But every diver should know the one illness that turns a great day bad: decompression sickness, better known as the bends. Knowing the signs can save a life.

We run a 24-hour walk-in clinic on Prachanukroh Road in Patong. We are not a hyperbaric chamber, but we are often the first stop for a diver who feels wrong after a dive. We give oxygen, check you, and arrange an urgent chamber if you need one. Here is what every diver should know.

What Decompression Sickness Really Is

When you dive, your body takes in nitrogen from the air in your tank. The deeper and longer you go, the more nitrogen soaks into your blood and tissues. If you come up slowly, that nitrogen leaves your body safely through your breath. If you come up too fast, it cannot escape in time. Instead, it forms tiny bubbles inside you, like the fizz when you open a bottle. Those bubbles are what cause decompression sickness, and they can hurt joints, nerves, and the lungs.

This is why ascending too fast is so risky. Coming up quickly, skipping a safety stop, or diving too deep for too long all raise the danger. Doing many dives in a few days adds up too. That is why divers plan their depth and time, and rise slowly with a stop near the surface. The bends is not about being unfit or unlucky. It is about the physics of gas and pressure.

The Warning Signs Every Diver Should Know

The signs of decompression sickness can be easy to miss at first. The most common is joint pain, often in the shoulders, elbows, or knees. It may feel like a deep ache that will not go away. Many divers also feel tingling, numbness, or pins and needles in the arms or legs. Some feel dizzy, weak, or very tired for no clear reason. A blotchy, itchy rash can appear on the skin. These signs often start within an hour, but they can come up to 24 hours later.

Worse signs mean a worse case. Trouble breathing, chest pain, or a bad cough can point to bubbles in the lungs. Confusion, blurred vision, trouble walking, or weakness on one side can mean the nerves or brain are affected. These need help right away. Do not tell yourself it is just tiredness or a pulled muscle after a big day of diving. When in doubt, treat it as the bends.

What to Do, and How a Patong Clinic Helps

If you or a dive buddy show these signs, act fast. Stop diving right away and do not go back in the water. Lie down and rest. If oxygen is on hand, use it, because breathing pure oxygen helps push the nitrogen out. Drink water if you can. Do not fly and do not go up to high ground. Then get medical help as soon as possible. Time matters with the bends, and the sooner you start oxygen and treatment, the better you tend to do.

This is where our clinic fits in. We are open 24 hours a day, so you can come straight from the pier. The licensed doctor checks you, starts oxygen, and works out how bad it is. Serious cases need a recompression chamber, a special room that shrinks the bubbles. We do not have a chamber, but we stabilise you and arrange an urgent transfer to one. We also handle your insurance paperwork while you focus on getting well.

Decompression Sickness Warning Signs: Seek Help Now

• Joint pain or a deep ache in the shoulders, elbows, or knees after a dive
• Tingling, numbness, or pins and needles in the arms or legs
• Dizziness, weakness, or unusual tiredness with no clear cause
• A blotchy, itchy skin rash
• Trouble breathing, chest pain, or a bad cough
• Confusion, blurred vision, or trouble walking
• Weakness or numbness on one side of the body
• Any of these within minutes to 24 hours after diving

Frequently Asked Questions