We need to produce an original article for keyword "Whats Dangerous Fever". Probably they meant "What's Dangerous Fever". Provide article 600-900 words. Use only HTML tags: h2, h3, p, ul, ol, li, strong, em. No markdown fences. No mention AI-generated. Must be SEO-friendly, natural headings. Avoid unsupported claims. Use context optionally: we can include references to resources like 80000hours.org etc but ensure they are relevant and not unsupported. Should be safe. We need to write article with headings (h2, h3). Probably start with h1? Not allowed? Only h2, h3, p, ul, ol, li, strong, em. So we can start with h2 as top heading. Use h2 for main sections, h3 for subsections. Word count 600-900. Need to produce about maybe 700 words. Let's craft article about dangerous fever: definition, when fever is dangerous, causes, symptoms requiring medical attention, treatment, prevention, when to seek help, special populations. We must avoid unsupported claims: we can say "according to CDC" or "medical guidelines". But we must not fabricate specifics. We can say "healthcare professionals advise". Keep generic. We must not mention AI. Use only allowed tags. Let's draft ~750 words. We need to ensure no other tags like etc. Only those listed. Use

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      Understanding When a Fever Becomes Dangerous

      A fever is a temporary rise in body temperature, often a sign that the immune system is fighting an infection. While most fevers are harmless and resolve on their own, certain patterns or accompanying symptoms can indicate a more serious condition that requires prompt medical attention.

      What Temperature Is Considered a Fever?

      Normal body temperature varies, but most clinicians consider a temperature of 38 °C (100.4 °F) or higher as a fever. Temperatures between 37.5 °C and 38 °C (99.5 °F–100.4 °F) are sometimes labeled low‑grade fevers.

      When Does a Fever Warrant Concern?

      Healthcare providers look at several factors beyond the number on the thermometer:

      • Age of the person – infants under three months, elderly adults, and those with weakened immune systems are more vulnerable.
      • Duration – a fever lasting more than three days without improvement may need evaluation.
      • Associated symptoms – severe headache, stiff neck, rash, persistent vomiting, difficulty breathing, chest pain, abdominal pain, or confusion.
      • Underlying health conditions – chronic illnesses such as diabetes, heart disease, or cancer can lower the threshold for concern.

      Red‑Flag Symptoms in Children

      For children, parents should seek care if the child shows any of the following:

      1. Fever of 40 °C (104 °F) or higher.
      2. Lethargy or difficulty waking.
      3. Seizure activity.
      4. Persistent crying that cannot be soothed.
      5. Refusal to drink fluids leading to signs of dehydration (dry mouth, no tears, decreased urine).
      6. A rash that does not fade when pressed.

      Red‑Flag Symptoms in Adults

      Adults should consider urgent evaluation when experiencing:

      1. Fever above 39.4 °C (103 °F) that does not respond to over‑the‑counter antipyretics.