Rihanna is said to have an exaggerated sense of self-importance.

Rihanna has reportedly reached ''breaking point'' and is ''feeling lost''.

The 24-year-old singer has been in the spotlight after months of wild partying and doctors apparently fear for her health.

Friends say she is physically and mentally exhausted while experts believe her twitter posts reveal she could have a mental disorder.

They claimed she was showing signs of narcissistic personality disorder (NPD), needing attention and admiration at all times.

A friend told the Daily Star: ''She's reached breaking point. Ri says she's physically and mentally exhausted and feeling lost.

''I think she desperately needs help and some time off, not just from work but from all the other stresses of her life, too.''

The 'Talk That Talk' singer has been pictured flying around the globe attending showbiz parties and sparked fears for her health after tweeting pictures of herself hooked up to a drip in hospital.

Relationship psychologist Jo Hemmings said: ''Rihanna's erratic behavior could indicate that she suffers from NPD. Symptoms are an exaggerated sense of self-importance and a need for constant admiration, which Rihanna shows by posting semi-nude pics.

''If she does have NPD, with counseling she could recognize the damage she's causing.''

© Bang Showbiz