Alzheimer's Disease: Symptoms and Complications

Symptoms of Alzheimer's Disease

The symptoms of Alzheimer's disease begin gradually and worsen over time. Early symptoms are mild and can be overlooked, but as the disease progresses, symptoms seriously affect daily life.

• Memory loss. This is the most common early symptom of Alzheimer's. Recently learned information is particularly affected. The person asks the same questions repeatedly, forgets important dates or events, and misses appointments. They may need to ask family members for the same information over and over again. They become increasingly dependent on memory aids such as planners and reminders. In later stages, long-term memory is also affected; they may forget family members or their own life story.
• Difficulty with planning and problem-solving. Completing complex tasks becomes challenging. Following a recipe, paying monthly bills, managing a budget, or working with numbers becomes difficult. Tasks take much longer to complete than before. Concentration decreases. For example, cooking a meal or using a calculator (things that were once done easily) can become difficult.
• Difficulty completing familiar tasks. Even routine tasks become challenging. Getting lost on the way home, forgetting the rules of a game, or being unable to perform familiar tasks at work may occur. Using devices that were once used easily (such as a phone, remote control, or oven) becomes difficult. Driving to familiar places becomes a challenge.
• Confusion about time and place. Keeping track of dates, seasons, or the passage of time becomes difficult. They may forget what day it is. They may not know where they are or how they got there. The risk of getting lost outside the home increases. They may confuse the past and present; for example, they may believe they are still living in a home they no longer live in.
• Problems with visual and spatial relationships. Judging distances and distinguishing colors or contrasts becomes difficult. This can make driving dangerous. Seeing their own reflection in a mirror can be confusing; they may think it is someone else. The risk of falling on stairs or over thresholds increases.
• New problems with speaking and writing. They struggle to follow or join a conversation and cannot finish their sentences. They repeat the same story over and over. They have difficulty finding the right word or name objects incorrectly; for example, calling a watch a "hand thing." Vocabulary decreases. Reading and writing skills also decline.
• Misplacing objects. They place objects in unusual locations and then cannot find them. For example, they may put the remote control in the refrigerator or the keys in the trash can. In later stages, they may accuse others of stealing their belongings.
• Decreased judgment and decision-making. They make poor decisions; for example, giving money to scammers or wearing inappropriate clothing. Attention to personal hygiene and self-care decreases; they may forget to bathe or wear the same clothes for days. They make mistakes managing money and fail to pay bills.
• Withdrawing from work or social activities. They may give up hobbies, social events, sports activities, or work projects. They struggle to follow TV programs, participate in conversations, or continue favorite activities. They avoid social interactions because they are aware of the changes and feel embarrassed.
• Mood and personality changes. Depression, anxiety, fear, suspicion, or irritability may develop. They may behave very differently from their former personality; for example, someone who was once calm may become aggressive. They become emotionally sensitive, easily upset, or angered. They may react negatively to new situations, changes in routine, or unfamiliar people.
• Hallucinations and delusions. In later stages, they may see or hear things that are not there (hallucinations). False beliefs may develop (delusions), for example, believing that their spouse is being unfaithful or that someone is trying to harm them.

When to See a Doctor

You should definitely see a doctor in the following situations:

If memory loss is affecting daily life particularly forgetting recently learned information, missing important dates, or repeatedly asking the same questions professional evaluation is needed. A professional assessment is important to distinguish these changes from normal aging.

If there is difficulty with planning, problem-solving, or completing familiar tasks (particularly with routine activities such as managing finances, taking medications, or cooking) early evaluation should be done.

If personality or behavioral changes are noticeable (such as excessive suspicion, fear, depression, or aggression) these may be early signs of Alzheimer's disease.

If there is a family history of Alzheimer's and symptoms are a concern, especially if symptoms began before age 65 (indicating a risk of early-onset Alzheimer's) evaluation should be sought immediately.

Early diagnosis is important because treatments are most effective in the early stages. It also allows the patient and family time to plan for the future, make legal arrangements, and build support systems.

Complications of Alzheimer's Disease

As Alzheimer's disease progresses, various complications can develop. These complications reduce quality of life and increase the risk of mortality.

• Loss of communication. In later stages, the ability to speak is severely reduced or lost entirely. The person cannot express their needs, pain, or discomfort. This increases the difficulties for caregivers and deepens the patient's isolation.
• Difficulty swallowing (Dysphagia). The swallowing reflex is impaired. This increases the risk of malnutrition, dehydration, and aspiration (food or liquid entering the lungs). Aspiration pneumonia is one of the leading causes of death in Alzheimer's patients.
• Infections. The immune system weakens, mobility decreases, and personal hygiene deteriorates. This increases the risk of urinary tract infections, pneumonia, skin infections, and pressure sores (decubitus ulcers). Infections can further worsen confusion.
• Falls and injuries. Balance and coordination deteriorate, and visual-spatial perception decreases. The risk of falling is high and can lead to fractures (especially hip fractures) and head trauma. Falls result in further loss of independence and hospitalization.
• Getting lost. Wandering behavior is common, particularly in the middle stage. The person may leave home and become lost. This can lead to hypothermia, dehydration, or traffic accidents. GPS tracking devices and safety measures are necessary.
• Nutritional decline and weight loss. Appetite decreases, the person forgets to eat, and swallowing becomes more difficult. Serious weight loss and malnutrition develop. This increases the risk of infection and slows recovery. A gastrostomy tube (PEG) may sometimes be necessary.
• Incontinence. Bladder and bowel control is lost. This leads to skin problems, infections, and increased caregiving burden. Proper hygiene and protective measures are necessary.
• Behavioral and psychological symptoms. Agitation, aggression, screaming, hallucinations, delusions, nighttime wandering, and inappropriate sexual behavior may be seen. These symptoms exhaust caregivers and sometimes require antipsychotic medications, which carry a high risk of side effects.
• Caregiver burnout. Alzheimer's care requires around-the-clock attention. Caregivers experience chronic stress, depression, social isolation, physical exhaustion, and health problems. Caregiver support is critically important.
• Reduced life expectancy. The average life expectancy after an Alzheimer's diagnosis is 4-8 years, but varies greatly from person to person. Some people may live for 20 years, while others die sooner. Death is usually caused by infection or other complications.