The answer to this question somewhat depends on how ill your friend is and what age she or he is. Someone with an eating disorder can be dangerously ill, both psychologically and physically and may not be able to recognise that they are in need of urgent help. In those situations it is necessary that a friend does take action. This could entail informing their next-of-kin or accompanying them to their family doctor. When the person recovers, they will understand that you have acted in their best interest. Where you feel urgent help is required, it is best if you can in some way communicate your concern to the person, and try in some way to find a way in which you decide together what help to get. This is where a support service such as the telephone helpline can be very useful. It can provide you with the opportunity to talk through the decision. You may also wish to encourage your friend to use the helpline service for themselves so that they can explore in a safe and non threatening environment what it is they feel they need at this time.