It is well known that obesity increases the risk of lifestyle diseases. And in recent years, it has also been found to increase the risk of developing allergies. In particular, obesity worsens the symptoms of asthma, a condition that causes the airway to narrow making it difficult to breathe. A BMI over 25 greatly increases the prevalence of asthma as well as refractory asthma in adults. Women especially need to be careful as they are at higher risk. Find out the how obesity affects asthma and what you can do about it.