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Swimmer itch can be difficult to diagnose. A physician will perform a complete physical examination and compile a thorough medical history. However, skin biopsies and blood tests are not helpful in diagnosing the condition. Swimmer itch often resembles other skin conditions, including:

• Impetigo (bacterial infection of the skin)
  
• Chickenpox
  
• Poison ivy rash
  
• Herpes simplex viruses

A physician is most likely to diagnose swimmer itch based on a patient history of swimming in an area where swimmer itch commonly occurs, with symptoms following shortly after.

In most cases, swimmer itch does not require medical treatment. The condition usually resolves on its own over time. However, over-the-counter anti-itch creams or ointments may be used to treat the symptoms of itch or irritation. Other methods used to treat symptoms include:

• Oral antihistamines
  
• Corticosteroid creams
  
• Cool compresses
  
• Bathing in Epsom salts or baking soda
  
• Soaking in oatmeal baths

Prescription-strength lotions and creams and oral corticosteroids also are available to treat more severe cases of swimmer itch. Patients should not use any over-the-counter or prescription medication without first consulting a physician.

Although the itching associated with swimmer itch can be severe, affected individuals should avoid scratching. Scratching can cause abrasions and lead to infection. Patients who develop secondary bacterial infections from scratching can be treated with antibiotics.