Why Brain Fog Can Linger Even After CPAP Therapy Starts Working
Starting CPAP therapy for obstructive sleep apnea (OSA) often brings fast, visible wins: fewer night-time awakenings, a lower Apnea-Hypopnea Index (AHI), and less of the crushing daytime fatigue that made getting through an afternoon feel impossible. But one symptom tends to hang around longer than the rest — brain fog. Even people whose treatment numbers […]