Amy Winehouse's father, Mitch Winehouse, has been publicly critical of her partying ways before. But now he's revealed in a new interview that while Amy has scaled back the boozing, but she has much bigger problems to deal with.

The gist: Mitch says his daughter suffers from bulimia.

"She's not drinking as heavily now as she was then actually, but there are other problems. The other problem is the bulimia which is still apparent," Mitch said.

"Although she's put on about a stone in weight since the summer, it's still affecting her health and there are problems with substance abuse as well."

Amy Winehouse: Stopping off for some quality food.

"She's eating, although the eating disorder hasn't been fully addressed," her father continued. "If you look at [Amy Winehouse pics] in August and see her now you will see a marked change for the better. But it's a change for the better, it isn't a cure."

Mitch also said that Amy Winehouse only turned into a habitual user of hard drugs after marrying Blake Fielder-Civil earlier this year.

"She was a complete opponent of doing hard drugs - in fact, she got up and said she couldn't understand why people in the music industry took hard drugs and that all changed about six months ago when she got married to Blake."

Marriage will do that to you. Although she really ought to quit the McDonald's ... that's much worse for your heart than Blake Fielder-Civil could ever be.