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* Alzheimer’s disease
* Vascular dementia
* Lewy body dementia
* Frontotemporal dementia
* Parkinson’s disease dementia
* Mixed dementia
Different types can produce different early symptoms.
## Other Conditions Can Look Like Dementia
Several treatable problems can cause memory or thinking changes, including:
* Vitamin B12 deficiency
* Thyroid disorders
* Depression
* Sleep apnea
* Medication side effects
* Hearing loss
* Infections
* Dehydration
* Alcohol misuse
That is why early evaluation is important.
## When Should You See a Doctor?
Consider medical evaluation if you or someone close to you has:
* Progressive memory problems
* Repeated confusion
* Difficulty managing money
* Trouble completing familiar tasks
* Getting lost in familiar places
* Significant personality changes
* Increasing dependence on others
Early evaluation does not automatically mean dementia. It can help identify reversible causes and establish a baseline.
## Sudden Confusion Is Different
Dementia usually develops gradually.
**Sudden confusion over hours or days is not typical of ordinary dementia progression** and can indicate delirium, stroke, infection, low blood sugar, medication problems, or another urgent condition.
Sudden mental-status changes should be assessed promptly.
## Can Dementia Risk Be Reduced?
There is no guaranteed way to prevent all dementia, but several habits can support brain health:
* Stay physically active
* Manage blood pressure
* Control diabetes
* Avoid smoking
* Maintain social connections
* Treat hearing loss
* Sleep adequately
* Eat a balanced diet
* Stay mentally active
* Limit excessive alcohol use
These habits also support overall cardiovascular health.
## The Bottom Line
Eight early warning signs worth paying attention to include:
1. **Memory loss that affects daily life**
2. **Difficulty finding words**
3. **Trouble with familiar tasks**
4. **Confusion about time or place**
5. **Changes in walking or balance**
6. **Mood or personality changes**
7. **Poor judgment**
8. **Withdrawal from social activities**
One symptom alone does not prove dementia.
What matters most is **a progressive pattern of changes that interferes with everyday life**. If several of these signs are appearing together, getting checked early can help identify the cause and guide the next steps.
