At some point, most people feel they need to lose some weight and consider a diet.
When these feelings become so strong that they dominate a person's life, they may be developing an eating disorder.
Anyone can develop an eating disorder, although they most commonly occur in young women between the ages of 15 - 25. Eating disorders can start for a variety of reasons such as stress, low self-esteem or emotional problems and they can leave a person with a distorted body image.
There are three common eating disorders: anorexia nervosa, bulimia nervosa and binge eating disorder.
It is important to remember that the lines between eating disorders are often blurred and that many people exhibit mixed symptoms without meeting a precise definition.
Treatment for eating disorders can take many forms including inpatient and outpatient hospital treatment, treatment from GPs and support in the community. Other professionals like dieticians and occupational therapists may form part of a care team, and people can find self-help groups useful too.
Recovery from eating disorders can take a long time, and it is common for people to experience setbacks before achieving a full recovery.
If you know someone with an eating disorder and want to help them, first and foremost take them and their concerns seriously and be patient with them.
With her daughter as her focus, Emma has battled anorexia and got her life back.