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Symptoms of Parkinson’s

Medically reviewed by Evelyn O. Berman, M.D.
Written by Kelly Crumrin
Updated on August 5, 2021

Parkinson’s disease mainly affects the central nervous system (CNS), which is made up of the brain and spinal cord. In Parkinson’s disease, the brain cells that produce a neurotransmitter (chemical that transmits nerve signals between cells) called dopamine begin to die off. As these cells die, levels of dopamine drop, and communication between the brain and the rest of the body is impaired. Researchers believe parkinsonian symptoms become apparent when about half the dopaminergic cells have been destroyed. Levels of other neurotransmitters rise to compensate for the loss of dopamine, causing more symptoms.

Medications and other treatments can help manage many Parkinson’s symptoms.

Types of Parkinson’s Symptoms

Symptoms of Parkinson’s vary by the type of parkinsonism and between individuals. An individual with Parkinson’s will not necessarily experience all or even most symptoms. Parkinson’s is a progressive disease, which means that symptoms worsen gradually over time, new symptoms appear, and disability accumulates.

Motor Symptoms

Everyone with Parkinson’s experiences symptoms related to movement, known as motor symptoms. In early stages of Parkinson’s, motor symptoms are typically unilateral — limited to one side of the body. Motor symptoms are the hallmarks of parkinsonism, and the condition cannot be diagnosed without them. The most common motor symptoms of Parkinson’s include:

  • Bradykinesia (Slowed movement)
  • Tremor
  • Rigidity
  • Loss of balance

Other motor symptoms of parkinsonism include:

  • Stooped posture
  • Shuffling gait
  • Dystonia (repetitive twisting, swaying, or head-bobbing motions)
  • Painful muscle contractions
  • Muscle jerks or twitches
  • Freezing episodes
  • Mask-like facial expression
  • Decreased blinking
  • Softer, slurred, or mumbled speech
  • Speaking in a monotone voice
  • Drooling
  • Dysphagia (difficulty swallowing)
  • Micrographia (small handwriting)
  • Slowed or abnormal eye movements
  • Eyelid spasms
  • Difficulty opening the eyes

Nonmotor Symptoms

Many people with Parkinson’s experience other types of symptoms in addition to motor symptoms.

Cognitive Symptoms

According to studies, about 40 percent of those with Parkinson’s eventually experience cognitive difficulties. Cognitive changes, often referred to collectively as “cog fog” or “brain fog,” can include problems with memory, attention, processing information, finding the right words, slurred speech, learning and remembering new things, organization, and getting lost in familiar places.

Psychotic Symptoms

Between 20 percent and 40 percent of people who take medications for parkinsonism experience a loss of connection with reality known as psychosis. Psychosis can either be caused directly by the disease or as a side effect of treatment. Psychotic symptoms can include:

  • Visual hallucinations
  • Delusions
  • Paranoia
  • Irrational fears
  • Flashbacks
  • Nightmares

Sensory Symptoms

Decreased sense of smell is very common and often among the earliest symptoms of Parkinson’s. Approximately 96 percent of people newly diagnosed with Parkinson’s show a loss of sense of smell. Some people with Parkinson’s experience vision changes, including blurred vision, double vision, loss of sensitivity in the perception of color and contrast, and visual hallucinations. The sense of taste may also be affected by parkinsonism.

Mood and Personality Changes

Parkinson’s and medications for the condition often cause changes in mood and can affect personality traits. Psychological symptoms of Parkinson’s can include:

  • Depression
  • Anxiety
  • Anger
  • Irritability
  • Jealousy
  • Increased or decreased interest in sex
  • Impulsiveness
  • Compulsive behavior

Other Symptoms

Fatigue is common in Parkinson’s. Fatigue may not be caused directly by Parkinson’s, but stem from other symptoms, including motor difficulties, sleep problems, and depression, or be among the side effects of medication for parkinsonism.

Problems with sleep are widespread in people with Parkinson’s. Sleep disturbances are the most common sleep symptom, but insomnia, restless legs syndrome, nightmares, and difficulty turning over in bed are also experienced.

Orthostatic hypotension is the scientific term for feeling dizzy when you stand up. It is a common symptom of Parkinson’s – experienced by 20 to 30 percent of those with the condition – and can lead to faints and dangerous falls. Orthostatic hypotension is a result of low blood pressure either due to nerves damaged by the disease or as a side effect of Parkinson’s medication. Orthostatic hypotension usually happens within three minutes of standing. This symptom is more likely the older you get and the longer you have Parkinson’s.

Gastrointestinal (GI) symptoms, especially constipation, are among the most common Parkinson’s symptoms.

Bladder dysfunction is common in Parkinson’s. As many as 50 percent of those with advanced Parkinson’s report overactive bladder.

Pain in Parkinson’s disease comes in many varieties. Although Parkinson’s is not widely considered a painful disease, it can cause muscle pain from cramps and repetitive movements, neuropathy (nerve pain, or pins-and-needles numbness sensation), shooting pain such as sciatica, or a sharp, burning pain. Pain usually occurs on the side of the body most affected by Parkinson’s symptoms.

It is common for people with Parkinson’s to experience sexual dysfunction. Parkinson’s causes lowered libido and difficulty orgasming in both sexes. Motor symptoms can also make physical aspects of sex problematic. In men, Parkinson’s leads to erectile dysfunction and ejaculation problems. In women, decreased arousal, vaginal dryness, and pain with intercourse occur. In about 1 percent of people with Parkinson’s, medications cause hypersexuality — compulsive sexual behavior.

People with Parkinson’s are four times more likely to develop melanoma, a dangerous type of skin cancer. Those who have had melanoma are four times more likely to develop Parkinson’s.

What Are the Early Signs of Parkinson’s?

Parkinson’s begins differently for each person. Researchers theorize that constipation and loss of the sense of smell are often experienced years before any motor symptoms, although they are seldom thought symptoms of Parkinson’s at the time. Many people notice sleep disturbances, micrographia (handwriting becoming smaller), mask-like facial expression, pain, or softer, quieter voice first. Others notice motor symptoms such as stiffness, tremors, or trouble walking or moving. Some people experience multiple symptoms at once.

Do Men and Women Experience Different Parkinson’s Symptoms?

Men are nearly four times as likely as women to develop Parkinson’s, and the genders may experience Parkinson’s in different ways. Studies have shown that women develop Parkinson’s about two years later than men. Women are more likely to experience tremor as their first motor symptom, while men more often present with stiffness and bradykinesia (slowed movement). Nonmotor symptoms differ between men and women, too. Women are more likely to report mood changes, fatigue, pain, and constipation, while men reported higher incidences of sexual dysfunction, loss of smell and taste, drooling, and sleepiness during the day. Dopaminergic medications — drugs that influence dopamine levels — may be less effective in women, and women are more likely to develop dyskinesia (involuntary writhing, swaying, fidgeting, or bobbing movements) as a side effect of these drugs.

Condition Guide

Updated on August 5, 2021
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Evelyn O. Berman, M.D. is a neurology and pediatric specialist and treats disorders of the brain in children. Review provided by VeriMed Healthcare Network. Learn more about her here
Kelly Crumrin is a senior editor at MyHealthTeam and leads the creation of content that educates and empowers people with chronic illnesses. Learn more about her here

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