Although early signs of Parkinson's disease are usually mild and may not be noticed, some signs include tremors, slowed movements, rigid muscles and impaired balance or posture, according to Mayo Clinic. Symptoms usually begin on one particular side of the body and may remain worse on that side while progressing to both sides.
Tremors, or shaking, characteristic of Parkinson's disease typically begin in the hands or fingers, notes Mayo Clinic. A so-called "pill rolling" tremor may develop, which is a back-and-forth motion rubbing the forefinger and thumb together. Tremors may occur when the hand is at rest.
Bradykinesia, or slowed movements, are also indicative of Parkinson's disease. As the disease progresses, the ability to move is reduced and normal tasks are time-consumptive and difficult. It may become harder to get up from a seated position.
Muscle stiffness and rigidness that lessens and limits range-of-motion is common in Parkinson's disease sufferers. Muscle rigidity can also cause pain. Posture may become progressively stooped, and balance problems can result.
Speech problems are also a common symptom of Parkinson's disease. Speech may become slurred, quick or soft, and it may lack its usual inflections. Speech may also sound more monotone than usual.