Lindsay Lohan needs "psychiatric help", say her friends.

The 'Mean Girls' actress has been left devastated by her split from DJ Samantha Ronson and pals fears she is on the brink of a breakdown.

A source said: "Lindsay is on hiatus with her publicist because she's not working or booking jobs. She is completely unmanageable.

"Lindsay needs to get psychiatric help. Her friends are really sad for her, but she's out of control, and now she's all alone."

The source added: "Dina is begging Lindsay's friends to go there and help her. All of Lindsay's life, Dina never acted like a role model. She only ever wanted to be her friend. Lindsay keeps getting used."

Following their split last week, Samantha changed the locks on the Hollywood Hills home she shared with Lindsay and was even said to be seeking a restraining order against her, although she has denied the claims.

Lindsay has insisted the year-long romance is not over, claiming the pair are just "on a break".