Amy Winehouse writing "suicidal music"

Troubled Amy Winehouse has almost become a recluse since contracting a contagious skin condition -- and friends are terrified about the singer's negative state of mind.

The 'Rehab' star, 24, is feeling so low that she has been writing sinister song lyrics about death; and they are so dark -- they're being described as "suicidal music".

A source said: "Her next album is darker than ever. Amy’s got low self-esteem anyway but her skin has made her want to hide away from the rest of the world. And we have started noticing more and more cuts on her arms.

"Her problems are pushing her over the edge and she’s turning into a depressed recluse. It’s not good for her to stay in so much.

"People try to get her to leave the house and tell her not to worry about what people say. But she’d rather sit around her dingy flat all day writing about death."

Despite the morbid nature of the new material, it's sure to be a hit with fans. The source added to British newspaper The Sun: "She’s written quite a lot of the third album already.

"It is very, very dark but she produces some of her best music when she’s in pain — and the past few months have been hell for her.

"She might have all this fame and wealth but she’s never been so down as she is now."

Amy's husband, Blake Fielder-Civil -- who's currently locked up in London's Pentonville Prison on assault and conspiracy charges -- has been bombarding the singer with divorce threats -- leaving her unsure about her future.

Blake, 25, has been demanding Amy visit him in prison for marriage crisis talks. A source said: "He’s having a hard time in jail because of who he’s married to and gets wound up because Amy keeps missing visits or gets turned away for being late.

"There’s no excuse for her to miss visits. We think she does it on purpose sometimes because she doesn’t want to see him.

"Amy’s real friends are hoping that he follows through with the threats to divorce her."