How do you know if you have asthma?

generally asthma is something that gets better with time. Its entirely possible for someone to have asthma in childhood and outgrow it by adulthood. From what you are describing it would definately make me think asthma as one of the primary causes of your cough, but without being able to ask you some more questions I couldnt be sure. (i.e. is it worse during a particular time of the day, does anything precipitate it for instance pets/pollen allergies etc) best of speaking to your GP. There is a possibility you may benefit from a bronchodilator which will open up the airways. You may also benefit from taking a steroid inhaler, which reduces inflammation in the long run, but again your best off speaking to your GP