The 19-year-old model is currently seeking help for "emotional trauma" at Malibu's Soba Recovery Center, a drug and alcohol treatment facility that helps deal with the underlying psychological causes of addiction.
It has now emerged her 10-month romance with rapper Angel Haze recently came to an end, reported New York Post.
The split wasn't the reason why she voluntarily entered rehab but it was due to a variety of pressures in her life, a source claimed.
Meanwhile, Ireland - whose parents are Hollywood stars Kim Basinger and Alec Baldwin - insisted her family are not the reason behind her problems.
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Ireland revealed on Twitter earlier this week that she was seeking help to address her "trauma".
She wrote: "I checked myself into Soba for two weeks to just get away for a little bit. I'm not much a party cat but I am here deal with.
"Some emotional trauma and getting the intensive therapy I needed in order to recover. Someday I'll feel ready to share my story..Openly without feeling the way I do. Right now I just need a breather. I needed a chance to work on myself and gather all the tools.