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  1. Articles
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  3. Sea Bather’s Eruption

Sea Bather’s Eruption

MMukdahan International Hospitalon July 26, 20263 min read
Sea Bather’s Eruption

These larvae contain stinging cells called nematocysts, which can release venom when they become trapped against the skin. The condition may occur while swimming, diving, snorkelling, or participating in other seawater activities.

Symptoms of Sea Bather’s Eruption

Symptoms may begin while the person is still in the water or several hours afterwards.

Common signs include:

๐ Intense itching, stinging, or burning

๐ Small red bumps or raised spots

๐ A rash that may resemble insect bites

๐ Skin irritation beneath swimwear, wetsuits, straps, or areas where larvae become trapped

๐ Symptoms that worsen after rubbing the skin or rinsing with fresh water while contaminated clothing is still being worn

The rash and itching may continue for several days and occasionally for one or two weeks. The severity depends on the amount of exposure and the person’s sensitivity to the venom.

What to Do After Exposure

If itching or burning begins while swimming:

๐ Leave the water immediately.

๐ Remove swimwear or the wetsuit as soon as possible.

๐ Avoid rubbing or scratching the affected skin.

๐ Rinse the body with clean seawater before using fresh water, when possible.

๐ Wash contaminated clothing separately before wearing it again.

Fresh water may trigger remaining stinging cells while they are still attached to the skin. After the clothing and visible material have been removed, the person may shower and gently clean the skin.

Treatment

Mild symptoms may improve with simple supportive care.

Treatment may include:

๐ Applying a cool compress to reduce itching and discomfort

๐ Using a topical corticosteroid cream as advised by a doctor or pharmacist

๐ Taking an oral antihistamine to relieve itching

๐ Avoiding scratching, which can damage the skin and increase the risk of infection

๐ Keeping the affected area clean and dry

Young children, pregnant women, and people with underlying medical conditions should consult a healthcare professional before using medication.

When to Seek Immediate Medical Attention

Go to a hospital immediately if the person develops:

๐ Swelling of the face, lips, tongue, or eyelids

๐ Difficulty breathing or wheezing

๐ Dizziness or fainting

๐ Widespread hives

๐ Large, painful, or rapidly worsening skin lesions

๐ Persistent vomiting

๐ Severe weakness or reduced consciousness

These symptoms may indicate a serious allergic reaction requiring urgent treatment.

Prevention

The risk may be reduced by:

๐ Checking local beach warnings before entering the sea

๐ Avoiding swimming during reported jellyfish or sea-larvae outbreaks

๐ Removing swimwear promptly after leaving the water

๐ Washing swimwear thoroughly after use

๐ Avoiding rubbing the skin while still wearing wet swimwear

Sea bather’s eruption is usually not dangerous, but severe allergic symptoms require immediate medical attention.

 

Reference :

Bangkok Hospital Phuket Sea Bather’s Eruption

ArokaGO Providers Bangkok Hospital Phuket

M
Mukdahan International Hospital

Independent Writer

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  • Symptoms of Sea Bather's Eruption
  • What to Do After Exposure
  • Treatment
  • When to Seek Immediate Medical Attention
  • Prevention

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M
Mukdahan International Hospital

Writer

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