Drug abuse is said to be one of the main reasons why Khloe Kardashian’s marriage with Lamar Odom is in trouble.

According to a TMZ report, Odom has had a drug abuse problem for the last two years. And, although he was admitted to a rehab facility in San Diego, Calif., last August and stayed off drugs for some time after his three-week stay there, Odom has reportedly not been successful in kicking the habit. 

According to the report, Odom started using recreational drugs again when the basketball season ended, and Odom has been resisting attempts to get him back into rehab.

"Khloe is more concerned about saving Lamar than ending her marriage," a source familiar with the situation told TMZ. The source spoke to the celebrity news site in the hopes of quashing rumors that the “Keeping Up With The Kardashians” star has filed for divorce after two women came forward to allege her husband, a Los Angeles Clippers player, slept with them.

On Thursday, Kardashian further fuelled rumors that she was calling it quits with her husband of four years when she was photographed after her gym session in the Woodland Hills area of Los Angeles without her wedding or engagement rings.

A source told HollywoodLife that the 29-year-old reality show star purposely removed her rings to send Odom a message.

“Khloe definitely had the ring with her but while working out, she took it off,” the source told HollywoodLife. “But she knew she would be getting photographed on her way out and she wanted it to happen so she could give Lamar a wake up call.”

“They are having trouble, but she wants him to fight for her trust and love. The romance isn’t really there when it comes to Lamar. So this was a little bit of a test to see how he would react,” the source added.