Do you know how to treat an asthma attack? Paramedic Liam explains how. Asthma is a common condition that affects your breathing. It cannot currently be cured, but if it's well treated you should not have problems with symptoms. If you're having an asthma attack, sit up straight, to help your breathing. Try to stay calm and use your asthma reliever inhaler if you have one. Remember only call 999 if: you start to feel worse at any time, do not feel better after taking the maximum dose using an as