Respected user, hi I evaluated your query thoroughly. *At first glance its anxiety related symptoms provided any underlying pathology is excluded by thorough clinical evaluation & necessary evaluation like X-ray Chest , Pulmonary function test etc. *Effects over lungs after withdrawal of smoking ( if stopped at present ) or continuous insult to bronchi in case of current smoking ; decreased lung immunity are of major concerns with Psychology aspects. *Your role as a true friend : - give her tremendous moral support to keep absolute abstinence from smoking & see that she doesn`t divert herself to another abuse substance like LSD or marijuana etc. This is the corner stone of the therapy. - make her relax , calm by various means. - deep breathing exercises with YOGA must for 30 min. without failure. - regular walking of 30-40 min. in fresh air to rejuvenate lungs with fresh oxygen. - avoid all oily / spicy / nonveg stuffs / beverages / excess ghee / sugar - avoid exposure to congested areas , crowds, pollen containing atmosphere excess cold. - maintain her hydration , BP , Blood sugar levels. - avoid prolong fasting / overeating. - have adequate sound sleep of 8 hours. - no alcohol consumption if any. - counsel her for any underlying fear or problem which she is not able to disclose to her parents . - food rich in protein , iron , fiber , vitamins & anti-oxidants to boost her immunity levels. - consult later doctor if required for further evaluation / counselling. Hope this clears your query. Thanks for using Health Care Magic & reviewing my answer. Wishing her fast and speedy recovery from the same. Welcome for any further queries in future. Regards dear take care of her.