Diving and Snorkeling Around Arugam Bay: Ear Equalising, Decompression Sickness, and Medical Clearance

Most people come to Arugam Bay for the surf, but plenty add a day of snorkeling over the reef at Peanut Farm or Baby Point, or book a scuba trip further afield — Pigeon Island and the wrecks near Trincomalee are a popular add-on for travelers based here. Diving and snorkeling are generally safe, well-supervised activities, but they carry a few specific medical risks that don’t come up with ordinary swimming or surfing. We see a handful of these every month, and almost all of them are preventable with a bit of planning.

Ear equalising: the number one skill and the number one injury

Every certified diver learns to equalise — pinching the nose and gently blowing to push air up the Eustachian tube and balance pressure behind the eardrum as you descend. Snorkelers duck-diving down a few metres need to do the same thing, even though it’s rarely taught properly outside a dive course.

The injury we see most often is barotrauma: pain, pressure, or a “blocked” feeling in one or both ears that comes on during or shortly after a dive or a deep duck-dive. Mild cases feel like a bad head cold. More serious cases involve sharp pain, ringing, dizziness, or a pop followed by fluid or blood coming from the ear — signs of a burst eardrum.

The fix is prevention: equalise early and often, well before you feel pressure, not after. Never force it. If your ears won’t clear, stop descending, go back up a metre or two, and try again. Pushing through pain is how eardrums perforate.

When ear pain after diving isn’t “just water”

Ear pain after a dive trip gets waved off as swimmer’s ear more often than it should be. The difference matters for treatment. Swimmer’s ear is an infection that builds up over a day or two and is worse when you tug the earlobe. Barotrauma from equalising starts during or immediately after the dive itself, and can come with dizziness or hearing loss that infection alone doesn’t cause. If you’re not sure which one you have, come in — looking inside with an otoscope tells us immediately, and treating a perforated eardrum as a routine ear infection can make things worse.

Decompression sickness: rare, but the rules are non-negotiable

Decompression sickness (DCS, “the bends”) happens when nitrogen absorbed into the blood and tissue during a scuba dive forms bubbles as you surface too quickly or fly too soon afterward. It’s uncommon with a reputable operator who follows dive tables and safety stops properly, but it does happen, and Sri Lanka’s east coast is a long way from a recompression chamber if it does.

Watch for symptoms appearing anywhere from thirty minutes to twenty-four hours after a dive:

• Unusual joint or muscle pain, especially in the shoulders, elbows, or knees, that doesn’t fit an obvious injury
• Numbness, tingling, or weakness in a limb
• Dizziness, confusion, or difficulty thinking clearly
• Extreme fatigue out of proportion to the dive itself
• A rash with a mottled or marbled appearance
• Shortness of breath or chest pain

Any of these after a dive is an emergency, not a “wait and see.” Get to us or the nearest hospital immediately and tell them you’ve been diving — this changes the treatment plan. Because chamber access from this coast can mean a long transfer, prevention through a properly run dive operation matters far more than usual. Dive with a PADI or SSI-certified operator, don’t skip safety stops, and don’t push your depth or bottom time on the last dive of a trip.

Flying — and mountain driving — after diving

The rule divers get told and the rule divers actually follow are often two different things. Wait at least eighteen hours after a single no-decompression dive before flying, and twenty-four hours or more after multiple dives in a day or several days of diving. The same nitrogen-in-the-blood physics applies to driving up into the hill country (Ella, Nuwara Eliya) shortly after diving, since altitude has the same effect on dissolved gas as cabin pressure does. If you’ve got an onward flight or a trip up-country booked, plan your last dive around it, not the other way around.

Who needs medical clearance before diving

Most healthy adults can dive or snorkel without seeing a doctor first, but a few things should prompt a conversation with us before you get in the water:

• Asthma, especially if it’s triggered by exercise or cold air
• A recent ear infection, ear surgery, or a perforated eardrum that hasn’t fully healed
• Heart conditions, or any history of fainting or seizures
• Pregnancy — diving isn’t recommended at any stage
• A bad cold, blocked sinuses, or an ear that isn’t equalising normally on land — dive another day instead
• Certain medications, particularly ones that cause drowsiness or affect blood pressure

Most dive centres will ask you to fill in a medical questionnaire before a course or first dive. Answer it honestly rather than ticking through it — it exists because some of these conditions genuinely change the risk, and we’re happy to see you for a quick pre-dive check if anything on the form applies to you.

Snorkeling has its own, smaller list of risks

Snorkelers skip the pressure-related risks of scuba but still duck-dive, spend hours face-down in the sun, and are often weaker swimmers than they think once there’s current involved. Reef cuts, jellyfish stings, and sunburn on the back of the neck and thighs are the most common things we treat after a snorkeling day. Wear a rash vest, reapply reef-safe sunscreen, and treat fins as mandatory rather than optional — most snorkeling trouble in Arugam Bay’s current involves someone who went in without them.

When to come and see us

Walk in for any ear pain, pressure, or hearing change during or after a dive, any of the decompression sickness symptoms listed above, or anything that feels “off” in the hours after a dive that you can’t otherwise explain. We can assess barotrauma, check for a perforated eardrum, and coordinate urgent transfer if decompression sickness is a real possibility — the sooner that starts, the better the outcome.

Related reading

• Swimmer’s Ear in Arugam Bay: The Infection That Isn’t Surfer’s Ear
• Ear Wax Removal in Arugam Bay: Blocked Ears After Surfing
• Rip Currents in Arugam Bay: How to Spot Them and What to Do If You’re Caught

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This article is general health information and not a substitute for medical advice or a dive medical exam. If you have ear pain, unusual symptoms after diving, or any concern before a dive trip, walk in and see us any time — we’re open 24 hours on Panama Road — or call 1990 for free emergency transport.