Autism

Overview

Autism, also called autism spectrum disorder, is a lifelong condition that affects how a person communicates, interacts, and experiences the world. It is a difference in brain development, not an illness.

Yes. Around 1 in 100 people in the UK and internationally are autistic. It is one of the most common neurodevelopmental conditions.

Autism affects people of every gender, culture, income level, and background. It is usually noticed in childhood, but some people are not diagnosed until adulthood or later in life.

Symptoms

Common symptoms

• Difficulty understanding and using language, tone, or body language
• Finding it hard to read other people’s feelings or intentions
• Preferring routines and finding change upsetting
• Unusual or intense interests in specific topics
• Sensitivity to light, sound, touch, taste, or smell
• Difficulty making or keeping friendships

Symptoms in children

• Not responding to their name by 12 months
• Delayed speech or not speaking at all
• Limited eye contact or facial expressions
• Repeating actions, words, or sounds
• Lining up toys or objects rather than playing imaginatively
• Getting very upset by changes in routine

Symptoms in older adults

• Long-standing difficulty with social situations or relationships
• A strong preference for routines and disliking surprises
• Sensory sensitivities that make busy environments overwhelming
• Feeling different from others but unsure why
• Having intense interests or a deep memory for facts

Causes

Main causes

• Autism is not caused by a single factor. It likely results from a mix of genetic and environmental influences before and around birth.
• Research suggests that many genes are involved in brain development and how the brain connects.
• There is no evidence that childhood vaccines, parenting style, or diet cause autism.

Risk factors

• Having a family member with autism
• Being born prematurely or at a low birth weight
• Having certain genetic conditions, such as fragile X syndrome
• Being born to older parents

When to see a doctor

See a doctor urgently if:

• If your child is not meeting expected developmental milestones, such as not babbling or pointing by 12 months, ask for a routine check-up soon.
• If a family member is in immediate danger due to a severe meltdown or self-harm, call your local emergency number.

Book a routine appointment if:

• If you suspect your child or another family member might be autistic, make an appointment with your GP or health visitor.
• If you are an adult who thinks you may be autistic, you can ask your GP about a referral for a formal assessment.

Diagnosis

A diagnosis of autism is made through a detailed assessment by specialists. For children, this often involves the family doctor, paediatricians, and child development teams. For adults, the assessment is done by mental health or learning disability specialists.

Tests that may be done

• There is no blood test or brain scan for autism. Instead, professionals use interviews, observations, and questions about development.
• They may watch how the child plays, communicates, and interacts.
• They may talk with the person about their experiences and ask family members for examples from childhood.

What to expect at your appointment

The assessment process can take several weeks or months. It usually involves more than one appointment. At the end, the team will explain whether the person meets the criteria for autism. Even without a formal diagnosis, support and adjustments can still be put in place.

Treatment

Autism is a lifelong condition and is not something to be 'cured'. Treatment focuses on supporting communication, managing distress, and improving quality of life. Many autistic people benefit from therapies and modifications to their environment.

Self-care at home

• Create predictable routines and use visual schedules or timers if helpful.
• Reduce sensory overload by using ear defenders, dim lighting, or calm quiet spaces.
• Build in downtime after social activities to rest and recharge.
• Use clear, simple language and give extra time for processing.
• Find and encourage special interests — these can be a source of joy and strength.
• Join online or local peer support groups to share experiences.

Medical treatments

There is no medication for autism itself. However, some people may be offered medication for conditions that often occur alongside autism, such as anxiety, depression, attention difficulties, or sleep problems. Any medication must be prescribed and monitored by a qualified doctor, who will explain the benefits and possible side effects.

When is surgery considered?

Not applicable to autism. Surgery may be needed for unrelated health problems, but autism itself is not treated with surgery.

Living with this condition

Life with autism is different for every person. Some people need little support, while others need help with daily tasks. A good plan is to focus on strengths, reduce stress, and build a team of people who understand — family, friends, educators, and health professionals.

Lifestyle tips

• Keep a consistent sleep routine and aim for enough rest.
• Exercise regularly — it can help with mood, concentration, and reducing stress.
• Limit unplanned changes where possible, and prepare ahead for each new situation.
• Stay connected to people who accept you as you are.

Diet and exercise

Eat a balanced diet with plenty of vegetables, fruit, whole grains, and protein. Some autistic people have very strong food preferences or sensory issues around food, so work with a dietitian if mealtimes are stressful. Physical activity should be enjoyable — walking, swimming, cycling, dancing, or any movement that feels good.

Mental health and emotional wellbeing

Autistic people are more likely to experience anxiety, depression, and feeling overwhelmed, especially when they feel misunderstood. Looking after mental health is just as important as physical health. It is okay to ask for help from a counsellor or psychologist who understands neurodiversity.

Prevention

There is no known way to prevent autism, and it is not an illness to be prevented. Autism is a natural variation in how the brain develops.

Vaccines

Childhood vaccines do not cause autism. You can confidently follow the recommended vaccination schedule for your child. Protecting against serious infections supports healthy development.

Screening programmes

There is no routine screening test for autism in babies. Healthcare providers watch development at routine check-ups and can refer for a full assessment if there are concerns.

Complications

If left untreated

• Without support, autistic people may experience high stress, anxiety, or depression.
• They may struggle in school or work because their needs are not understood.
• They may be at greater risk of isolation or bullying.
• Physical health issues are also more common, so regular check-ups are important.

Long-term outlook

With the right understanding, adjustments, and support, autistic people can thrive. Many develop strong skills in areas they care about, build meaningful relationships, and live fulfilling lives. Early recognition and support make a very positive difference.

Find support

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