What are the signs of anaphylaxis?
Anaphylaxis is a severe systemic allergic reaction that can develop rapidly after exposure and affect breathing and circulation. Symptoms vary and overlap other conditions, so internet information alone should not be used for diagnosis.
Features, causes and evaluation
1. Features, causes and risks Hives or swelling may accompany throat tightness, wheeze, breathlessness, vomiting, dizziness or low blood pressure. Skin signs are not always present. A risk factor does not guarantee disease, and its absence does not exclude disease. Onset, duration, triggers, medicines and coexisting conditions change the assessment. 2. Clinical evaluation A health professional starts with history and examination and selects laboratory or imaging tests according to the likely possibilities. One out-of-range result does not always prove disease, and a normal result may not exclude every possibility. Age, pregnancy, medicines and clinical context matter.
Follow-up, prevention and when to seek help
1. Follow-up, prevention and safety Do not wait if suspected: call emergency services and use a prescribed epinephrine auto-injector promptly according to the person's plan. Medical observation is needed even after improvement because symptoms can recur. Treatment depends on diagnosis, severity, other conditions, pregnancy, medicines and personal preferences. Starting, stopping or changing a prescription without professional advice can be unsafe. 2. When to seek help Seek care for new, persistent, worsening or function-limiting symptoms. Sudden breathlessness, chest pain, fainting, new weakness or speech difficulty, uncontrolled bleeding, severe dehydration, confusion or risk of self-harm requires emergency help. This is general information and not a personal medical assessment.