💡TL;DR: Hemoptysis = blood with a cough from the lungs; hematemesis = blood with vomiting from the stomach or esophagus. Look for bright, frothy blood in mucus during a cough versus dark coffee‑ground or bright red blood mixed with food after nausea. Any vomiting of blood warrants emergency care; coughing

💡TL;DR: Epiglottitis is a sudden, bacterial throat infection that can block the airway within hours and needs emergency care, while croup is a common viral illness with a barky cough that usually improves in 3–4 days with calm care and a single steroid dose from your doctor. Look

💡TL;DR: Yes, pneumonia can be contagious when it is caused by a virus or bacteria, and it spreads at close range in cough and sneeze droplets. Viral cases are contagious for several days. Bacterial cases usually stop spreading about 24–48 hours after effective antibiotics. Walking pneumonia (Mycoplasma) can

💡TL;DR: A peak flow meter is a small home tool that shows how open your airways are by measuring how fast you can blow out (L/min). Check it daily and compare the highest of 3 blows to your personal best to guide your asthma action plan. Green 80–

💡TL;DR: Stridor is a harsh, high‑pitched sound on inhale from the upper airway; wheezing is a musical whistle on exhale from the lungs. Location (throat vs chest) and timing (in vs out) are the fastest ways to tell them apart. Stridor at rest, blue lips, or trouble swallowing

💡TL;DR: Bronchitis irritates the airways and is usually viral; pneumonia infects the lung's air sacs and tends to be more severe. Expect bronchitis to improve in 1–3 weeks and pneumonia to take 1–2+ weeks, with fatigue lingering. Antibiotics usually don't help acute bronchitis,

💡TL;DR: A NIOSH‑approved N95 respirator that seals well is the best protection for wildfire smoke. Expect to pay about $1–$3 per disposable N95, while reusable P100 respirators cost roughly $30–$150 and replacement filters $8–$20 per pair. Cloth or simple surgical masks won’t protect you

💡TL;DR: If you are wheezing, first decide if it is an emergency, then use the fastest safe steps to open your airways. Mild wheezing with easy breathing can often be calmed at home with rescue inhalers, nebulizers, or breathing exercises, while severe shortness of breath, blue lips, or noisy

💡TL;DR: Most sore throats are viral and get better in a few days; only about 5–15% of adults and 20–30% of children have strep (CDC). Strep usually starts suddenly with severe throat pain and fever and no cough, while viral sore throats build more slowly with cough