Does spring always fix Seasonal Affective Disorder (SAD)?

No, spring usually improves SAD, but not always. Most people feel better gradually over weeks as days lengthen — waking naturally, craving less carbs, sleeping better. But if by late March or April you still feel low, lack energy, or have trouble concentrating, that’s depression needing professional help, not just SAD. Don’t wait for summer; see a doctor if symptoms aren’t clearly improving.