Spotting the Physical Signs of Dementia: What You Need to Know

Getting older inevitably brings a few hiccups—misplacing your glasses, forgetting a name here or there. Most of the time those slips are harmless, just part of the aging journey. But when everyday tasks start to feel impossible, it could be more than ordinary forgetfulness.

Experts say roughly seven million Americans live with dementia today, and that number could double by 2060. The turning point, according to Dr. Stephanie Nothelle, a geriatrician at Johns Hopkins, is when a cognitive problem begins to interfere with daily function—like no longer being able to drive a familiar route or handle taxes after decades of doing them.

Dementia isn’t a single disease; it’s an umbrella term covering Alzheimer’s, vascular dementia, Lewy‑body dementia, Parkinson’s‑related dementia, and others. While each type has its own quirks, they all share a set of physical symptoms that often get overlooked. Below are the six most common bodily clues that warrant a closer look.

1. Trouble Walking and Keeping Balance

Walking may feel like a simple act, but it actually taps into a complex network of brain signals. Your feet send sensory feedback, your eyes map the terrain, and your brain has to coordinate everything in a split second. When that network starts to fray, you may notice frequent stumbling, an unsteady gait, or a sudden increase in falls. Dr. Nothelle notes that balance issues can surface early in the disease, even before other physical signs become obvious.

2. Changes in Posture and a Shuffling Gait

Especially common in Lewy‑body and Parkinson’s‑related dementia, a hunched posture, slower steps, or a shuffling walk can creep in. It’s easy to dismiss these as “just getting old,” but if the pattern emerges quickly or is accompanied by other changes, it’s worth flagging.

3. Altered Sense of Taste and Smell

Suddenly not noticing a burnt toast or missing the aroma of coffee can be a subtle red flag. While a cold or sinus issue can explain a temporary loss, persistent, unexplained changes—particularly in someone with other cognitive concerns—might point toward Lewy‑body dementia, according to Dr. Jori Fleisher of Rush University.

4. Swallowing Difficulties (Dysphagia)

People with dementia often report food or drink “going down the wrong pipe.” That misdirection can lead to aspiration pneumonia, a common and serious complication in later stages. Saliva‑borne bacteria entering the lungs is a recipe for infection, so any choking or coughing while eating should trigger a medical evaluation.

5. Bladder and Bowel Control Problems

Incontinence isn’t just an embarrassing inconvenience; it can be a symptom of the nerve degeneration that accompanies dementia. Likewise, new‑onset constipation may show up years before other motor symptoms, especially in Parkinson’s‑related cases.

6. Sleep Disturbances

Restless nights—like pacing, shouting, or even acting out dreams—can signal REM behavior disorder. This often precedes Parkinson’s or Lewy‑body dementia by many years. If a loved one is suddenly more active or vocal during sleep, mention it to their healthcare team.

Recognizing these physical signs early can be empowering. An early diagnosis opens doors to treatment options, planning, and support that can improve quality of life for both the person affected and their caregivers.