Cheefa, just because there are good strains for asthma doesn't mean they work beneficially for everyone. The sad thing about asthma is that THC and the other cannabinoids are great bronchodilators and have some marvelous anti-inflammatory effect, but all the other crap that's in weed smoke can still be very irritating to many people's lungs. You'll often get the "Nah, it's just fine" answer here. But I have fairly bad ashtma, and weed made mine worse. If I'd kept up using it, I'd have had to switch to eating or vaping it.

If you begin pointing your mom to, say, Erowid or NORML or other places where she can find solid information about cannabis health benefits, she's also going to find an equal amount of warnings that inhaled cannabis smoke is an irritant and can aggravate pulmonary conditions like asthma, also increasing your risk for bronchitis and/or pneumonia. So just be aware that for every reason supporting its use, there's an equal amount of reasons against it out there.

I cough and wheeze this time of year because of allergies, which do a far worse number on me than weed ever did. If you've got a runny nose and drainage in your head, that certainly does sound a lot more like allergies than asthma to me. This time of year, those are classic allergy symptoms, especially in the South (I live in Texas).