It's frustrating when people trivialize health conditions.
Trevor's friend forgot their asthma inhaler and wants Trevor to wait for them to go get it.
Trevor wants to reply to his friend.
Trevor says that his friend should go get their asthma inhaler just in case.
Trevor tells their friend that asthma is no big deal, so they should just leave without the asthma inhaler.
Trevor's friend is happy that Trevor is considerate about their health issues.
Trevor's friend feels like Trevor doesn't care about their well-being at all.