<s>[INST] Hi!   I am 43 years old, 125 lbs and in good health.  I have some food allergies, and a mold allergy. It has been very hot and humid out on and off all summer.  Each time the temp and humidity rise, I have a really hard time breathing.  Feels like someone is sitting on my chest, and it is extremely painful to take a breath.  It goes away slowly when I get into an air conditioned area with lower humidity / lower temp. [/INST] Hello, i can understand your concern.I would like to know if you are a known asthamatic.it has been found that people with asthma do tend to get worsening of the symptoms like difficulty in breathing, tightness of chest, wheeze.I would advise a pulmonary function test initially to know the presence of any obstructive lung diseases.I would suggest an inhalation bronchi dilator like formoterol initially which is a long acting one. If required a steroid inhaler would be prescribed later. Kindly get back to us with the reports. Hope you are satisfied with our response. Thanks for choosing Chat Doctor </s>