There are five stages of Parkinson’s disease, and symptoms will worsen with each stage. While symptoms will show up differently in each person, it helps to have a general idea of what to look for. For younger ages, non-motor symptoms such as loss of smell, constipation, and difficulty sleeping may show up first. Early signs of Parkinson’s disease include slower, stiffer, and more involuntary movements. This may show up in a resting tremor, or the slight shaking of one hand, issues balancing and maintaining an upright position, or changes in handwriting. Because Parkinson’s disease makes it difficult to control movements, handwriting may suddenly appear smaller or cramped. In the early stages of the disease, there may only be one or two symptoms present. If you notice more than one of these symptoms in yourself or a loved one, consult a doctor.