What are the types of asthma that are bad?

All types: It is not necessarily the type but your individual severity rating. Some people with intermittent (once in awhile attacks) wind up in the hospital while those with moderate to severe persistent asthma do not. Your individual reaction to the "triggers" is a determining factor. Check with your physician.

Risky asthma: People who have had severe life-threatening asthma requiring breathing tube are at risk for more severe asthma. Other risk factors for severe asthma attacks are patients with depression/psychological problems, those not taking their medications as directed, and mold allergy. Patients with Aspirin reactions that trigger asthma can have severe reactions too.