Asthma

You suffer from asthma, causing the following effects:

Short of breath

You must make a DC13 constitution save when taking the dash action in combat or sprinting outside of combat. On failure, you have disadvantage on all attack rolls and ability checks, made on the rest of the turn and the following turn of combat, or in the minutes immediately after sprinting outside of combat. If you tak asthma medicine, you have advantage on the constitution save.

Sensitive lungs

You have disadvantage on saving throws against gaseous effects. You must also make a DC 13 constitution save while in dusty, smoky, moldy or otherwise heavily irritant-filled locations, whenever you make an ability check of any kind. On failure, you have disadvantage on that check. Asthma medication gives you advantage on the constitution save.