Anorexia is often not recognized by the people as a disease and in many cases those affected will not admit it.
The first step is to understand if he/she really suffers from an eating disorder. For example, if someone follows a very strict diet, but continues to live his life in a natural way, feeling free of all about food and calories scheme, it is said that he/she doesn’t suffer. If someone has an obsessive thought with respect to food and destroys any form of pleasure, then that person might need your help.
Remember: when an anorexic sufferer is asking for your help, it is important to not improvise but seek advice from a doctor or a specialized eating disorders structure.