Vascular dementia is another major cause. It occurs when problems affecting the brain's blood supply damage brain tissue and impair cognitive function. The condition can follow a stroke or develop alongside other blood vessel disease. Some people experience noticeable changes after a major event, while others develop a gradual decline associated with ongoing vascular damage.
This is one reason that managing cardiovascular health is important. High blood pressure, diabetes, smoking, and elevated cholesterol can damage blood vessels and increase the risk of stroke and other complications. Managing these conditions does not guarantee that dementia will be prevented, but it can reduce important health risks and support overall well-being.
Dementia with Lewy bodies is associated with abnormal deposits of a protein called alpha-synuclein in the brain. People may experience fluctuations in alertness, visual hallucinations, movement difficulties, sleep disturbances, and cognitive changes. The symptoms and their order can differ from person to person, and the condition may overlap with features seen in other neurological disorders.
Frontotemporal dementia affects areas of the brain involved in behavior, personality, and language. In some cases, changes in social behavior, emotional responses, judgment, or speech become noticeable before significant memory problems. This illustrates why dementia should not be understood as a condition that always begins with forgetting names or misplacing objects.
Some people have mixed dementia, meaning that more than one disease process contributes to their symptoms. For example, changes associated with Alzheimer's disease may occur alongside vascular damage. The presence of several contributing conditions can make diagnosis more complicated and reinforces the importance of a comprehensive medical assessment.
Family history can influence risk, but having a relative with dementia does not mean that another family member will inevitably develop it. Some forms of dementia are associated with rare inherited genetic variants, but most cases are not explained by a single inherited mutation. People worried about a strong family history can discuss their concerns with a healthcare professional.
There are also potentially treatable conditions that can resemble or worsen cognitive impairment. Depression, sleep disorders, thyroid problems, vitamin deficiencies, infections, hearing loss, and medication effects may affect memory or concentration. A person experiencing new cognitive symptoms should therefore receive an assessment rather than assuming that the cause is dementia.
Although no lifestyle strategy can guarantee prevention, several habits support general and cardiovascular health and may help reduce the risk of cognitive decline.
First, keep blood pressure under control. High blood pressure can damage blood vessels and increase the risk of stroke. Regular checks, appropriate medication when prescribed, physical activity, and a balanced diet can help manage it.
Second, manage diabetes and cholesterol. These conditions can contribute to vascular damage. Follow your treatment plan, attend recommended checkups, and ask your healthcare professional how to monitor and manage your risk factors.
Third, remain physically active. Regular movement supports cardiovascular health, balance, strength, and general well-being. Walking, swimming, cycling, or other suitable activities can be adapted to a person's ability. Anyone with significant mobility problems or a medical condition should ask a healthcare professional which activities are appropriate.
Fourth, protect sleep. Persistent sleep difficulties can affect attention, memory, mood, and daytime functioning. A regular sleep schedule may help, while symptoms such as loud snoring, gasping during sleep, or severe daytime sleepiness should be discussed with a clinician because sleep disorders may require treatment.
Fifth, stay socially and mentally engaged. Conversation, reading, learning, hobbies, music, and other meaningful activities can provide cognitive stimulation and support quality of life. These activities are not guaranteed to prevent dementia, but they can help people maintain interests, relationships, and daily routines.
Sixth, address hearing and vision problems. Difficulty hearing conversations can make communication exhausting and may cause a person to appear inattentive. Regular assessment and appropriate hearing or vision support can make daily life easier and help people remain engaged with others.
Finally, avoid smoking and limit excessive alcohol consumption. Smoking harms blood vessels and increases the risk of several serious diseases. Heavy alcohol use can also damage health and contribute to cognitive problems. People who drink heavily or have difficulty reducing alcohol should seek appropriate professional support.
A healthy diet can support these habits, but no particular food or supplement should be presented as a cure for dementia. A varied eating pattern with vegetables, fruit, whole grains, suitable protein sources, and unsaturated fats can support cardiovascular health. Supplements should be used for an identified need or on professional advice rather than because of an online promise to restore memory.
The most realistic approach is to focus on what can be managed. Genetics and age cannot be changed, and not every case of dementia is preventable. However, treating medical conditions, protecting cardiovascular health, staying active, addressing hearing and sleep problems, and seeking help for cognitive changes are worthwhile steps at any age.
Chapter 5: When to See a Doctor and How to Support Someone With Memory Changes
Recognizing possible signs of dementia is only the first step. The next is deciding when to seek medical advice and how to respond in a way that protects the person's dignity and independence. Families sometimes delay an appointment because they are afraid of receiving a diagnosis, while others assume that every memory lapse means a serious disease. A balanced approach is more helpful.