What causes attention deficit hyperactivity disorder (ADHD)?

The exact cause of ADHD is unknown, but the condition has been shown to run in families.

Research has also identified a number of possible differences in the brains of people with ADHD when compared with those without the condition.

Other factors suggested as potentially having a role in ADHD include:

being born prematurely (before the 37th week of pregnancy)

having a low birthweight

smoking or alcohol or drug abuse during pregnancy

ADHD can occur in people of any intellectual ability, although it’s more common in people with learning difficulties.

How attention deficit…


Types of Pain

Pain is a general term that describes any kind of unpleasant or uncomfortable sensation in the body.

There are many different types and causes of pain, and these can be grouped into eight different categories to help with pain management:

Acute pain

Chronic pain

Breakthrough pain

Bone pain

Nerve pain

Phantom pain

Soft tissue pain

Referred pain.

Acute pain

This starts suddenly and only lasts for a short period (ie, minutes, hours, a couple of days, occasionally a month or two).

It is usually caused by a specific event or injury, such as:

A broken bone

A…


Anxiety is your body’s natural response to stress. It’s a feeling of fear or apprehension about what’s to come. The first day of school, going to a job interview, or giving a speech may cause most people to feel fearful and nervous.

But if your feelings of anxiety are extreme, last for longer than six months, and are interfering with your life, you may have an anxiety disorder.

What are anxiety disorders?

It’s normal to feel anxious about moving to a new place, starting a new job, or taking a test. This type of anxiety is unpleasant, but it may…

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store