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Introduction Parkinson’s disease affects movement when brain cells that make dopamine slowly decline. With less dopamine, signals from the brain to the muscles lose their smooth timing. That’s why tremor, slowness, stiffness, and balance changes can appear over time. Not everyone has the same start. Some notice a faint hand tremor. Others feel smaller steps, a softer voice, or less expression in the face. These changes can be mild at first, then become more noticeable in daily tasks like buttoning a shirt or writing. Begin with simple steps: keep a short symptom diary (what happened, when, what you were doing), stay active with gentle, regular movement, and discuss patterns with a clinician. Brain-engaging habits also help—try easy drills from this quick guide to exercising your brain . Results vary. Some people feel steadier with routine, sleep, and stress control; others need treatment changes. If symptoms worsen, or new ones ap...