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  2. Asthma - Causes and Triggers | NHLBI, NIH

    www.nhlbi.nih.gov/health/asthma/causes

    The following may also raise the risk of developing asthma: Allergies: Asthma is usually a type of allergic reaction. People who have asthma often have other types of allergies, such as food or pollen allergies. Obesity: Being overweight can raise your risk of developing asthma or make your asthma symptoms worse. Race or ethnicity: Puerto

  3. Asthma - What Is Asthma? - NHLBI, NIH

    www.nhlbi.nih.gov/health/asthma

    Asthma is a chronic (long-term) condition that affects the airways in the lungs. The airways are tubes that carry air in and out of your lungs. If you have asthma, your airways can become inflamed and narrowed at times. This makes it harder for air to flow out of your airways when you breathe out. About 1 in 13 people in the United States have ...

  4. Asthma Care Quick Reference - NHLBI, NIH

    www.nhlbi.nih.gov/files/docs/guidelines/asthma_qrg.pdf

    Risk Asthma exacerbations requiring oral systemic corticosteroids ‡ 0–1/year ≥ 2 exacerb. in 6 months, or wheezing ≥4x per year lasting >1 day AND risk factors for persistent asthma ≥ 2/year Consider severity and interval since last asthma exacerbation. Frequency and severity may fluctuate over time for patients in any severity category.

  5. Respiratory Failure - Causes and Risk Factors | NHLBI, NIH

    www.nhlbi.nih.gov/health/respiratory-failure/causes

    Respiratory failure can be caused by several factors. Conditions that make it difficult to breathe in and get air into your lungs: Examples include weakness following a stroke, collapsed airways, and food getting stuck in and blocking your windpipe. Conditions that make it difficult for you to breathe out: Asthma causes your airways to narrow ...

  6. COPD - Causes and Risk Factors | NHLBI, NIH

    www.nhlbi.nih.gov/health/copd/causes

    English. Español. Cigarette smoking is the most common cause of COPD in the United States. Long-term smoking or breathing in tobacco smoke or pollutants in the air damages the lungs and airways. Causes and Risk Factors of Chronic Obstructive Pulmonary Disease (COPD) - YouTube.

  7. Sleep Apnea - Causes and Risk Factors - NHLBI, NIH

    www.nhlbi.nih.gov/health/sleep-apnea/causes

    Lifestyle habits: Drinking alcohol and smoking can raise your risk of sleep apnea. Alcohol can make the muscles of your mouth and throat relax, which may close your upper airway. Smoking can cause Inflammation in your upper airway, which affects breathing. Obesity: This condition is a common cause of sleep apnea.

  8. Peripheral Artery Disease Causes and Risk Factors - NHLBI, NIH

    www.nhlbi.nih.gov/health/peripheral-artery-disease/causes

    Quitting smoking is a very important step in lowering your risk of PAD. Not getting enough physical activity can make other PAD risk factors worse. Stress can make your arteries tighten and narrow. Eating foods high in saturated fats external link and following other unhealthy eating patterns can also increase your risk of PAD.

  9. Asthma Research - NHLBI, NIH

    www.nhlbi.nih.gov/research/asthma

    For more than 20 years, the NHLBI Severe Asthma Research Program has transformed our knowledge of severe asthma. Research supported through the program has identified sex, race, secondhand smoke, pneumonia, and obesity as key risk factors for asthma. Studies have also found genetic variations linked to severe asthma and biomarkers for asthma ...

  10. High Blood Pressure - Causes and Risk Factors | NHLBI, NIH

    www.nhlbi.nih.gov/health/high-blood-pressure/causes

    Research shows that factors such as income, education level, where you live, and the type of job you have, as well as stressors on the job may raise your risk of high blood pressure. Working early or late shifts is one example of a social factor that can raise your risk. Experiencing discrimination and poverty has been linked to high blood ...

  11. Overweight and Obesity - Causes and Risk Factors | NHLBI, NIH

    www.nhlbi.nih.gov/health/overweight-and-obesity/causes

    There are many risk factors for overweight and obesity. Some are individual factors like knowledge, skills, and behaviors. Others are in your environment, such as school, workplace, and neighborhood. Additionally, food industry practices and marketing as well as social and cultural norms and values can also impact your risk.