Asthma can be caused by multiple factors. Heredity and exposure to certain chemicals, tobacco, or illness are some of the factors that put one person at risk of developing asthma more than others. One such factor is where you are living. While there are some asthma-friendly cities in the country, certain others increase the chances and require patients to take more precautions.

Here is a list of the most challenging US cities to live in for asthma patients:

1. Oklahoma City
This is one of the most challenging US cities to live in for asthma patients due to its poor air quality and high pollen levels. Living here for any asthma patient might not be a pleasant experience. Also, public smoking laws are missing in the city, which can make it difficult for people with asthma to step out for fresh air.

2. Detroit
The capital city of Michigan has a high asthma prevalence rate and a high rate of death due to this ailment. In addition to this, Detroit has poor air quality, weak public smoking laws, high levels of pollen, and a high rate of poverty. All these factors contribute to making the city a difficult place to live for asthma patients.

3. Philadelphia
This city might offer a decent standard of living and some picturesque landscapes to its inhabitants. However, despite that, it might not be one of the greatest places to live for people with asthma. The city scores below average in categories of air quality, smoking laws, poverty rate, and deaths due to asthma.

4. Richmond
Richmond, Virginia also ranks below average on all the important factors that are necessary for an asthma patient to live a quality life. It ranks poorly on air quality, pollen levels, deaths due to asthma, visits to the emergency rooms, and public smoking laws.

5. Memphis
One might find the air quality to be average in this city. However, on all the factors, the city does not have good results. Memphis records a high rate of deaths caused due to asthma. Also, the occurrence rate of asthma is high here. The number of asthma specialists in the city is also found to be low. To add to it, the poverty rate and the pollen levels are recorded to be high in this city.

6. Springfield
This city in Massachusetts has got the highest emergency room visits due to asthma in the entire country. This is why it is considered to be one of the most challenging US cities to live in for asthma patients. It ranks on the 10th spot in asthma prevalence and on the 7h spot for pollen levels in the city.