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Conditions
----------

*   [High pressure headache](#intracranial-hypertension)
*   [Subarachnoid haemorrhage](#subarachnoid-haemorrhage)

High pressure headache
----------------------

Intracranial hypertension (IH) is high pressure inside the skull, which may happen suddenly or build up gradually over time.

  

#### Symptoms of this condition may include:

*   Headache getting worse over time
*   Difficulty concentrating
*   Feeling sick or nausea
*   Seeing double
*   Severe headache

Our Health A-Z contains more information on [**High pressure headache**](/condition/intracranial-hypertension/#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)

Subarachnoid haemorrhage
------------------------

A subarachnoid haemorrhage is a type of stroke caused by bleeding in and around the brain.

  

#### Symptoms of this condition may include:

*   Headache that came on suddenly
*   Severe headache
*   Feeling sick or nausea
*   Vomiting
*   Eyes sensitive to light

Our Health A-Z contains more information on [**Subarachnoid haemorrhage**](/condition/subarachnoid-haemorrhage/#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 Feeling sick or nausea and Blurred vision