"Lindsay, call me."
That's the message recovering drug addict Daniel Baldwin has for Lindsay Lohan, he tells ABC News, one day after the troubled 21-year-old was arrested on suspicion of drunken driving and possession of cocaine.
Lohan's latest train wreck comes only two weeks after she left Promises rehab center with an alcohol detector around her ankle. It was her second go at sobriety in a year.
Hollywood's most famous rehabbing brother has been sober for eight months since completing rehab at nearby Renaissance Malibu, where he says the 90-day program helped him go straight.
"I have reached out to offer my services if she wants help," said Baldwin, who was critical of the care Lohan had received at Promises.
"She's a beautiful woman," said Baldwin. "She is digging herself out of another hole and it happened so soon after she got out."
But is the wild starlet a self-professed "dire-hard" addict, as Baldwin claims to be?
"There are two stereotypes: those who wake up in the morning and shake until they have another drink, and there are those like Lindsay whose life comes at them, and they feel things they don't want to feel," said Baldwin. "They numb themselves."
"If I have a flat tire and my front end is going, if I fix the front end and don't fix the back end, the front will go again," he said. "Lindsay needs to get her tires fixed."
Addiction has multifaceted components and there are no clear lines between what some call chemical addition and others see as a behavioral problem, according to Marc Fishman, medical director of Maryland Treatment Center at Johns Hopkins University.
"It's behavioral, physiological and psychological," said Fishman. "The syndrome involves the brain, the mind and the spirit."
Often, as in Lohan's case, young people start by experimenting with alcohol or drugs, but soon getting high accelerates into a pattern of reinforcement — hanging out with others who do the same.
"Each bit of use reinforces more, and by that time your brain receptors are hooked, the brain is enslaved and you really aren't having fun anymore," said Fishman.
Many risk factors feed addiction. Genetics and family history predispose certain people to addiction. And the younger a user, the greater likelihood of harm and resistance to treatment.
Sometimes a person's innate tolerance to drugs or alcohol is higher, which can make them more vulnerable to addiction.
"You hear in college, 'The liver is a muscle, just practice.' But some people can inherently take more alcohol with fewer negative consequences like headaches and throwing up," he said. "The goodies outweigh the baddies."
Thrill seeking as a personality trait might also play a role, as well as risk factors like economics — both poverty and, as in the case of Lohan, wealth can lead to addiction problems.
"What is germane to her case is the subculture of wealth that you see in sports and in Hollywood," said Fishman. "It's a microculture of indulgence. Most kids don't have millions of dollars in disposable income. Most have constraints with lots of rules and parental monitoring to keep the appetites of kids in check."
Good parenting is crucial in raising healthy children who are not vulnerable to addiction, according to Fishman.