Heat exhaustion

Disease Description (Causes and Symptoms)

• Definition: Taeyeol is an allergic skin disease of infancy that mainly occurs at approximately 2–4 months of age and is classified as an early form of atopic dermatitis. Because the diagnosis of “atopic dermatitis” is not commonly used for infants younger than 6 months, it is often described as “taeyeol.”
• Pathophysiology (brief): It develops through the combined effects of genetic predisposition (e.g., abnormalities in genes related to the skin barrier), reduced skin barrier function (dry skin), a hypersensitive (Th2-dominant) immune response, and environmental factors (temperature, humidity, and irritants).
• Main symptoms: Dry skin, severe itching (pruritus), red rashes (small, millet-like bumps), blisters (vesicles), scabs or scratch marks, occurring mainly on areas prone to eczema such as the cheeks, forehead, behind the ears, neck, and inner thighs. Sometimes, a urticaria-like appearance or signs of secondary infection (pustules, discharge, fever) may accompany the condition.

Treatment Methods

• Basic principles (standard treatment)
  • Moisturizing (emollient) treatment: The most basic and important form of care. Apply generously several times a day, especially within 3 minutes after bathing, to help restore the skin barrier.
  • Topical medications: When symptoms are severe, use low- to moderate-potency topical corticosteroids for a short period as directed by a doctor. For sensitive areas such as the face and skin folds, low-potency treatment for a short period is recommended. If necessary, a specialist may consider prescribing a topical calcineurin inhibitor (e.g., pimecrolimus).
  • Antihistamines: May be considered for a short period when itching is severe enough to cause sleep disturbance or major discomfort (with a doctor’s prescription).
  • Treatment for infection: If there is a secondary bacterial infection (e.g., Staphylococcus aureus), topical or systemic antibiotics may be used.
  • Rarely, in severe or treatment-resistant cases: Under the judgment of a pediatric dermatologist, phototherapy (with limited age ranges and indications), systemic immunosuppressants, or biologic agents may be considered (mainly for older age groups).
• Lifestyle management (important)
  • Indoor temperature and humidity control: A relative humidity of approximately 50–60% is recommended. Avoid overheating and sweating.
  • Bathing: Use lukewarm water (approximately 25°C) and keep baths short, within 10 minutes. Apply moisturizer within 3 minutes after bathing.
  • Clothing: Soft, non-irritating cotton clothing is recommended (wool and synthetic fibers may cause irritation).
  • Hand care: Keep the nails short and use mittens to prevent scratching.
  • Avoid irritants, fragrances, and detergents: Avoid products containing fragrances, alcohol, or strong detergents.
  • Feeding: Some studies suggest that breastfeeding may help relieve symptoms, but individual differences exist, so consult a doctor.
• Precautions
  • Long-term or extensive use of topical steroids may cause side effects (such as skin atrophy), so follow the doctor’s instructions.
  • If symptoms worsen (high fever, rapid spreading, increased pain, pus, or blisters), immediate medical attention is needed because a secondary infection may be suspected.
  • Do not repeatedly use home remedies or steroid creams without medical advice.

Checklist Before an Outpatient Visit (Including Recommended Items and Example Questions)

• Recommended items to bring
  • A list of currently used medications (including ointments), along with their doses and duration of use
  • Past medical history (including a family history of atopy, asthma, allergic rhinitis, and other conditions)
  • The time symptoms began and photographs showing their progression (the rash location and comparisons between severe and less severe periods)
  • A record of usual moisturizers, detergents, and bathing habits (including product names)
  • Feeding method (breastfeeding/mixed/formula) and the timing of food introduction (whether complementary foods have been started)
  • A record of responses to previous treatments (what was effective)
• Key information to show the doctor at the outpatient visit
  • When the rash first appeared and factors that improve or worsen it (heat, food, clothing, saliva, bowel movements, etc.)
  • Whether systemic symptoms are present, such as fever, low energy, or reduced feeding
• Example questions for the patient to ask before the outpatient visit (questions to ask the doctor in advance)
  • What are the possible causes of these symptoms?
  • Is it okay to continue using the moisturizer/ointment I am currently using?
  • What should I do if signs of infection (pustules or discharge) appear?

General Example Questions to Ask the Doctor

• What are the expected effects and possible side effects of this medication (or ointment)?
• If the symptoms are well managed, what is the prognosis? (Including the possibility of improvement before one year of age)
• Are there any lifestyle factors that require particular attention or substances that should be avoided?
• What ingredients do you recommend looking for in a moisturizer?

Examples of Condition-Specific Questions

• Could these symptoms be related to specific foods (e.g., milk or eggs)? Is food restriction necessary?
• The rash frequently appears on the face, especially around the eyes. What ointment can be used safely on sensitive areas?

References (Summary)

• Diagnosis is primarily made clinically based on symptoms, the distribution of symptoms, and age.
• The foundation of treatment is adequate moisturizing and avoidance of irritants, with medication such as low-potency topical steroids added when necessary.
• If symptoms are severe or signs of infection are present, evaluation by a pediatrician or dermatologist is necessary.