Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Yes, previous history of fluid in the lung can cause breathing problems at present.
Recurrence of fluid accumulation,
lung infection (
pneumonia) and
bronchitis are common causes for her symptoms.
So better to
consult pulmonologist and get done
1. Clinical examination of respiratory system
2. Chest
x ray 3. PFT (Pulmonary Function Test).
Chest x ray is needed to rule out lung infection and fluid in the lung.
PFT is needed to rule out bronchitis.
She may need antibiotics, inhaled bronchodilators and inhaled corticosteroid (ICS).
Hope I have solved your query.
I will be happy to help you further.
Wishing good health to your sister. Thanks.