A person experiencing cognitive decline may place objects in unusual locations and become unable to reconstruct how they got there. They might put a wallet in the refrigerator, leave a remote control in a cupboard or place important documents somewhere that makes little sense.
They may also become convinced that another person has moved or stolen the missing item.
This can create tension within families. Relatives may know that nobody touched the object, but the person experiencing memory difficulties may feel genuinely certain that someone is responsible.
Accusations should not automatically be interpreted as deliberate behavior. Confusion and memory problems can affect how someone understands missing belongings.
A calm response is usually more helpful than an argument. Instead of insisting that the person is wrong, family members can help search for the item and consider creating consistent storage places for frequently used belongings.
A designated tray for keys, a fixed location for glasses and simple labels on storage areas may reduce everyday frustration.
Still, these strategies do not replace an assessment if the behavior becomes frequent or is accompanied by other cognitive changes.
What to watch for: Repeatedly putting belongings in unusual places, being unable to retrace steps, frequently losing important objects or becoming suspicious that others are taking them.
8. Poor Judgment and Changes in Decision-Making
Changes in judgment can be less obvious than memory problems, but they may have serious consequences.
A person who has always managed money carefully may begin making unusual financial decisions. They may respond to suspicious messages, give money to unfamiliar individuals, overlook obvious risks or repeatedly purchase unnecessary items.
Other changes may involve personal safety. Someone may dress inappropriately for the weather, forget important precautions or fail to recognize situations that could put them at risk.
Personal care can also become less consistent. A person who previously took pride in their appearance may gradually pay less attention to hygiene, clothing or household organization.
These changes are not necessarily intentional. Decision-making depends on several cognitive abilities, including evaluating information, anticipating consequences and recognizing potential danger.
When those abilities are affected, a person may not realize that a decision is unusual or risky.
Families may initially interpret these behaviors as stubbornness, irresponsibility or a change in values. But if the person has developed a consistent pattern of poor decisions that is unlike their previous behavior, it deserves attention.
Financial safety is particularly important. Families may need to discuss practical safeguards, such as reviewing unusual transactions, setting up payment reminders or helping the person identify suspicious requests.
The goal should be to preserve independence wherever possible while reducing avoidable risks.
What to watch for: Unusual financial decisions, vulnerability to scams, poor personal safety choices, declining attention to hygiene or repeated decisions that seem inconsistent with the person's established habits.
9. Withdrawing From Work, Hobbies or Social Activities
A person who once enjoyed social gatherings may gradually begin avoiding them. They may stop attending regular meetings, lose interest in hobbies or become quieter during family conversations.
At first, relatives may assume that the person is simply tired, busy or less interested in socializing.
But withdrawal can sometimes be connected to cognitive changes.
Imagine someone who has always enjoyed playing cards with friends. Over time, they may find it increasingly difficult to remember the rules, follow the conversation or keep track of what other people are doing. Rather than explain the problem, they may begin making excuses to stay home.
Someone else may stop attending a community group because conversations feel too fast or because they worry about forgetting names.
Social situations can become stressful when a person is struggling to process information. Background noise, several conversations happening simultaneously and unfamiliar environments may increase the difficulty.
The person may also feel embarrassed about making mistakes in front of others.
Withdrawal can therefore be a response to fear, frustration or a desire to avoid situations that expose cognitive difficulties.
However, social withdrawal is not specific to dementia. Depression, grief, chronic pain, hearing loss, loneliness, mobility limitations and many other conditions can cause similar changes.
It is important to consider the person's overall circumstances rather than assuming that a loss of interest automatically indicates cognitive decline.
Gentle invitations, familiar activities and smaller social gatherings may help someone remain connected without feeling overwhelmed.
What to watch for: Giving up favorite hobbies, avoiding familiar social groups, becoming unusually quiet in conversations or repeatedly making excuses to avoid activities that were previously enjoyable.
10. Changes in Mood, Personality or Emotional Responses
Sometimes the earliest noticeable changes are emotional rather than memory-related.
A person who has always been relaxed may become unusually anxious, irritable or suspicious. Someone who was previously outgoing may become withdrawn. Another person may react strongly to small disruptions that would not normally have bothered them.
These changes can be confusing for relatives because they may seem unrelated to memory.
A family member might notice that the person becomes upset when asked to complete a familiar task, feels uncomfortable in busy environments or becomes unusually suspicious about everyday situations.
Some individuals may experience increased anxiety, sadness or fear. Others may become frustrated because they recognize that certain tasks are becoming harder but cannot explain why.
Personality changes can also include reduced interest in other people's feelings, unusual impulsiveness or behavior that seems out of character.
The reason is that the brain is involved in much more than remembering facts. It also helps regulate emotions, interpret social situations and control behavior.
Different types of dementia can affect these abilities in different ways. In some conditions, changes in personality, motivation or social behavior may appear before obvious memory problems.
Nevertheless, mood changes are common in many other situations. Depression, anxiety, sleep disorders, hormonal changes, medication effects, grief and physical illness can all affect personality and emotional responses.
The key is to notice whether the change is persistent, unusual for that person and accompanied by other difficulties with thinking or daily activities.
Responding with criticism rarely helps. A person who is confused or frightened may need reassurance, patience and a medical assessment rather than arguments about their behavior.
What to watch for: Persistent new anxiety, irritability, suspicion, emotional outbursts, loss of interest, unusual impulsiveness or personality changes that cannot be explained by a temporary situation.
The Symptoms in the Picture: What Is Relevant and What Is Not?
The image uses several dramatic visual elements to attract attention: a sleeping woman, an illustration of the brain, a person holding their abdomen and a close-up of an arm with visible skin changes. These images may suggest that many different physical symptoms are connected to dementia.
That impression needs clarification.
Dementia can affect sleep, behavior, movement and the ability to manage daily activities. Some people with particular forms of dementia experience sleep disturbances, excessive daytime sleepiness or changes in their normal sleep-wake cycle. But sleeping more than usual, by itself, is not one of the defining early warning signs.