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Conditions
----------

*   [Alzheimer's disease](#alzheimers-disease)
*   [Major head injury](#head-injury-severe)

Alzheimer's disease
-------------------

Alzheimer's disease is the most common type of dementia, affecting an estimated 850,000 people in the UK.

  

#### Symptoms of this condition may include:

*   Memory loss
*   Confused or muddled
*   Aggressive behaviour
*   Difficulty sleeping
*   Repetitive behaviour

Our Health A-Z contains more information on [**Alzheimer's disease**](/condition/alzheimers-disease/#symptoms).

[If you are worried about this condition you can try our free AI Symptom Checker here.](https://webapp.your.md/login?utm_source=yourmd&utm_medium=in-article&utm_campaign=your-symptoms)

Major head injury
-----------------

Severe head injuries require immediate medical attention because there's a risk of serious brain damage.

  

#### Symptoms of this condition may include:

*   Head injury
*   Memory loss
*   Confusion which is new
*   Seeing double
*   Lightheaded or feeling dizzy

Our Health A-Z contains more information on [**Major head injury**](/condition/head-injury-severe/#symptoms).

[If you are worried about this condition you can try our free AI Symptom Checker here.](https://webapp.your.md/login?utm_source=yourmd&utm_medium=in-article&utm_campaign=your-symptoms)

Conditions related to Memory loss and Confused or muddled