It is reassuring that her oxygen levels are normal. Shortness of breath with normal oxygen saturation can occur for several reasons. Common causes include early-stage lung conditions (like asthma or COPD), heart issues, anemia, acid reflux, or anxiety. Treatment depends entirely on the underlying cause. For airway issues, doctors may prescribe bronchodilators like salbutamol or inhaled corticosteroids. If anemia is the cause, iron supplements are used, while heart-related breathlessness might require beta-blockers or diuretics. Please consult her physician for an evaluation, including blood tests and an ECG, to safely identify the cause and receive a tailored treatment plan.