Dr. Jennifer Ashton told \"Good Morning America\" that although asthma is a common lung condition, it can potentially be serious and in some cases, fatal.

\"It's characterized by inflammation and narrowing of the passageways in our lung,\" Ashton said, adding that asthma can cause the following symptoms: wheezing, chest tightness, shortness of breath and cough.

In some cases, Aston explained, asthma can lower blood oxygen levels.

Ashton said Laurel most likely died from severe asthma exacerbation, which can happen when a person does not respond to traditional treatments. The condition can last for hours and can become fatal once someone's oxygen levels drop beyond a certain point.

\"We do have to remember though, still, it's rare,\" Ashton said.

According to the Centers for Disease Control and Prevention, there are over 6 million children under the age of 18 living with asthma. In 2017, 185 children died from asthma, the CDC reports.

How do parents know if an asthma attack is serious enough for an emergency room visit?

1. If your child stops talking to catch their breath.

2. They use their abdominal muscles to breathe.

3. They widen their nostrils when breathing in.

4. If you see a blue-ish tint to the lips or nail beds, that is an emergency.

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