8 early Parkinson’s disease symptoms that are too easy to miss

This movement disorder is more treatable when caught early, but Parkinson’s disease symptoms can appear quite differently from one person to another. Talk to your doctor if you’re worried about any of these signs. By Alyssa Jung. All images: Getty Images

Changed handwriting

If your handwriting starts to go from big and loopy to small and cramped, this could be one of the earliest Parkinson’s disease symptoms. “Teachers with Parkinson’s will notice students complaining that they can’t read their handwriting when they write on the blackboard,” says Deborah Hall, MD, a neurologist. Look for letters getting smaller and words crowding together. Many patients have slower movement and trouble with repetitive tasks, like handwriting.

Watch out for these other 41 strange symptoms that could signal a serious disease.

Reduced sense of smell

If you’re having trouble smelling pungent foods or no longer pick up your favourite scents, see a doctor. It’s not the most common symptom of Parkinson’s, but Dr. Hall says patients who suffer a loss of smell report it being the earliest sign they experience. The link between reduced sense of smell and Parkinson’s isn’t clear, but one theory is that the clumps of the protein alpha-synuclein, found in the brains of all Parkinson’s patients, may form in the part of the brain responsible for smell before migrating to other areas and affecting motor function.

Discover 12 diseases that doctors can actually diagnose through smell. 

Trouble sleeping

If you were once a peaceful sleeper, but now toss and turn, flail your limbs, or even fall out of bed, those sleep problems could be Parkinson’s disease symptoms. It’s normal to have an occasional restless night, but talk to your doctor if you or your partner notices extra movement when you’re in a deep sleep, or if you start sleep-talking. More research is needed to discover why disturbed sleep and Parkinson’s are related, but one theory is that the degeneration of specific regions of the brain stem that can cause disordered sleeping may play a role in other Parkinson’s disease symptoms.

Here are 13 other surprising things that could be causing your sleep woes. 


If you’re not moving your bowels every day, or are increasingly straining, this can be an early sign of Parkinson’s. The disease alters the body’s autonomic nervous system, which controls processes like digestion and bowel function. Constipation on its own isn’t unusual, but if you’re experiencing other symptoms like difficulty sleeping and trouble moving or walking, talk to your doctor.

Here are 12 things your tummy could be trying to tell you. 


Sometimes patients can develop depression after learning they have Parkinson’s, but it’s also common for people to be depressed years before they start to exhibit physical symptoms, says Michele Tagliati, MD, director of the Movement Disorders Program at Cedars-Sinai Medical Center in California. “Parkinson’s is characterised as a movement disorder because of a lack of dopamine in the brain, but there are also low levels of other neurotransmitters like serotonin, which are intimately related to depression,” he says. Parkinson’s patients who are depressed tend to feel apathetic and generally disinterested in things they used to enjoy, compared to feeling intensely sad or helpless, as is common in primary depression. “They lose pleasure in the simple things of life, like waking up in the morning and buying the paper,” says Dr. Tagliati. Treatment for depression includes counselling, antidepressant medication, and in the most extreme cases, electric shock therapy.

Learn more about living with Parkinson’s

Tremors or shaking when relaxed

Shaking can be normal after lots of exercise or if you’re anxious, or as a side effect of some medications. But a slight shake in your finger, thumb, hand, chin, lip, or limbs when your body is at rest and your muscles are relaxed could signal Parkinson’s disease symptoms, according to the National Parkinson Foundation. About 70 percent of people with the disease experience a resting tremor, and it can become more noticeable during stress or excitement. These are the most common symptoms and often tip people off to the disease, but when Parkinson’s patients think back they realise they experienced loss of smell, disturbed sleep, or anxiety before the tremors began.

Stiffness and slowed movements

Watch for an abnormal stiffness in your joints along with muscle weakness that doesn’t go away and makes everyday tasks like walking, teeth brushing, buttoning shirts, or cutting food difficult. If you no longer swing your arms when walking, your feet feel “stuck to the floor” (causing you to hesitate before taking a step), or people comment that you look stiff when you haven’t been injured, the National Parkinson Foundation suggests seeing a doctor.

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Softer voice, or masked face

Doctors say that a softer voice or masked, expressionless face is a common sign of the disease. Some patients with Parkinson’s disease symptoms may also talk softer without noticing or have excessively fast speech or rapid stammering. Parkinson’s causes disruption of movement, including facial muscles.

This article first appeared on Reader’s Digest.