Asperger syndrome is part of a group of conditions where people experience difficulties with communication and social skills, and which can lead to isolation and emotional problems. Because there is a wide range of severity and symptoms, the conditions are collectively known as autistic spectrum disorders. Symptoms vary from so mild that the person can function as well as anyone else around them, to so severe that they are completely unable to take part in normal society.

People with Asperger syndrome are usually more mildly affected than those with autism. In fact, many people with milder symptoms are never diagnosed at all, and some argue that Asperger syndrome is simply a variation of normal rather than a medical condition or disorder.

Even so, many people with Asperger syndrome (or their family) find it causes particular problems getting on with daily life and this can result in isolation, confusion and other difficulties, all of which could be defined as 'disease'.

There are three main aspects to Asperger syndrome:

Difficulty with communication
Although they may be able to speak fluently, sometimes there are difficulties judging or understanding the reactions of those they are talking to. Common problems include:
"  Failing to notice the body language of others.
"  Appearing insensitive to the feelings or views of the listener.
"  Continually talking, unaware of the listener's interest.
"  Appearing over-precise in what they say.
"  Taking comments literally (for example, misunderstanding jokes, metaphors or colloquialisms).
Difficulty in social relationships
People with Asperger syndrome often enjoy or want to develop social contacts but find mixing with others very hard. In particular, they have problems with:
"  Understanding non-verbal signals such as body language, gestures, facial expressions and tone of voice.
"  Obsessions with objects, interests or routines which tend to interfere further with building social relationships (this is known as stereotyped or repetitive behaviour).
Lack of imagination and creative play
Children with Asperger syndrome are often of average or above intelligence, and may be particularly good at learning facts and figures. However, they may also lack imagination and find creative play or thinking in the abstract very difficult.

This means they may be particularly good at topics such as maths or history, but struggle with subjects such as philosophy, religious education or creative arts.