“The families I work with almost always say the same thing: ‘We knew something was wrong for a long time, but we didn’t know when it crossed the line from a problem into something that needed professional help,'” says Dr. Ponlawat Pitsuwan, Physician and Addiction Medicine Specialist at Phuket Island Rehab. “The truth is there is rarely a single dramatic moment. There is a gradual accumulation of signs, and understanding what those signs mean neurobiologically helps families move from guilt and confusion to clarity and action.”
The Clinical Signs: What the DSM-5 Actually Measures
The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) replaced the older distinction between “substance abuse” and “substance dependence” with a single spectrum called substance use disorder (SUD), graded by severity. The eleven criteria fall into four clusters: impaired control, social impairment, risky use, and pharmacological indicators. Understanding these clusters transforms vague worry into specific, observable patterns.
Impaired control includes taking the substance in larger amounts or for longer periods than intended, persistent desire or repeated unsuccessful attempts to cut down, spending a disproportionate amount of time obtaining, using, or recovering from the substance, and craving. Social impairment includes failure to fulfil major role obligations at work, school, or home, continued use despite persistent social or interpersonal problems caused by the substance, and giving up important social, occupational, or recreational activities. Risky use means recurrent use in physically hazardous situations and continued use despite knowledge that a physical or psychological problem is caused or worsened by the substance. Pharmacological indicators are tolerance (needing more to achieve the same effect) and withdrawal (physical symptoms when the substance is reduced or stopped).
Meeting two to three criteria indicates mild SUD. Four to five indicates moderate. Six or more indicates severe. Each increase in severity is associated with greater neuroadaptive changes in the brain’s reward, stress, and executive function systems, and with poorer outcomes without structured treatment.
Behavioural Signs That Families Notice First
While the DSM-5 criteria provide the clinical framework, families typically notice behavioural changes before they can articulate a clinical pattern. These observable signs often map directly onto the diagnostic criteria, even when neither the person using nor the family recognises them as such.
| Observable Sign | What It May Indicate (DSM-5 Criterion) | Why It Happens Neurobiologically |
|---|---|---|
| Drinking or using more than they say they will | Taking in larger amounts or longer than intended | Prefrontal cortex inhibitory control weakened by chronic substance exposure |
| Making promises to stop and breaking them repeatedly | Persistent desire or unsuccessful efforts to cut down | Incentive salience (dopamine-driven “wanting”) overrides conscious intention |
| Withdrawing from family, friends, hobbies | Giving up important activities | D2 receptor downregulation makes natural rewards feel unrewarding |
| Needing more to feel the same effect | Tolerance | Receptor downregulation and metabolic enzyme upregulation |
| Shaking, sweating, irritability, or nausea when not using | Withdrawal | GABA/glutamate imbalance, sympathetic nervous system rebound |
| Missing work, neglecting children, financial problems | Failure to fulfil role obligations | Prefrontal executive dysfunction and narrowing of motivational focus |
| Continuing to use despite health warnings (liver damage, anxiety, insomnia) | Continued use despite knowledge of harm | Compulsive drive from dorsal striatum overrides risk assessment |
Physical Signs That Should Not Be Ignored
Substance use disorders produce physical changes that become visible over time, and these often serve as the most concrete evidence that a problem has progressed beyond what willpower alone can manage. For alcohol, these include facial flushing or broken capillaries (spider naevi), abdominal bloating from early liver inflammation, unexplained weight loss or gain, poor sleep quality with early morning waking, and tremor in the hands, particularly noticeable in the morning before the first drink.
For stimulant use (cocaine, methamphetamine, non-prescribed stimulants), physical signs include significant weight loss, dental deterioration, dilated pupils, skin picking or sores, and rapid physical ageing. For opioid use, constricted pupils (miosis), chronic constipation, drowsiness, and slowed breathing are characteristic. For benzodiazepine misuse, cognitive slowing, memory lapses, unsteady gait, and paradoxical agitation are common.
The presence of withdrawal symptoms, physical reactions that occur when the person stops or reduces their use, is one of the clearest indicators that the brain and body have developed physiological dependence. Alcohol withdrawal can include tremor, sweating, nausea, seizures, and in severe cases, delirium tremens. Opioid withdrawal produces muscle aches, gastrointestinal distress, goosebumps, and intense dysphoria. Benzodiazepine withdrawal can be medically dangerous and produce seizures, severe anxiety, and perceptual disturbances.
How to Have the Conversation
Recognising the signs is only half of the challenge. The other half is approaching the person in a way that opens a door rather than building a wall. Research on motivational interviewing, the evidence-based communication method developed by William Miller and Stephen Rollnick, provides clear guidance on what works and what does not.
Confrontational interventions, the kind dramatised in reality television, where family members list grievances and deliver ultimatums, have been shown to be less effective than empathic, non-judgmental approaches. The CRAFT (Community Reinforcement and Family Training) method, which has a stronger evidence base than the traditional Johnson Intervention model, trains family members to reinforce sober behaviour, allow natural consequences of use to occur (without enabling), and strategically suggest treatment at moments when the person is most receptive.
Timing matters. Bringing up treatment immediately after a crisis (a health scare, a DUI, a family argument related to substance use) can be effective because the person’s own distress temporarily lowers their defences against accepting help. But the approach should still be compassionate, not punitive. The goal is to align with the person’s own discomfort rather than adding to it.
When Someone Refuses Help
Refusal to accept treatment is not necessarily refusal to change. It is often a reflection of ambivalence, a state in which the person simultaneously wants to stop and wants to continue. Ambivalence is a normal stage in the process of behaviour change, described in the Prochaska and DiClemente Transtheoretical Model as the “contemplation” stage: the person recognises the problem but is not yet ready to act.
What families can do during this stage is maintain boundaries, avoid enabling behaviours (making excuses, covering financial shortfalls, cleaning up consequences), and continue to express concern without issuing threats that they are unwilling or unable to follow through on. Each conversation, even if it does not result in immediate acceptance of treatment, plants a seed. Research shows that the majority of people who eventually enter treatment do so after multiple conversations, not after a single dramatic intervention.
When Substance Use Has Become More Than Occasional
If the patterns described in this article sound familiar, whether you are recognising them in someone you love or in yourself, the question is not “is it bad enough?” but “is it causing harm, and is that harm escalating?” The DSM-5 spectrum model of substance use disorder exists precisely because there is no bright line between “fine” and “needs rehab.” There is a gradient of severity, and early intervention at the mild end of the spectrum produces better outcomes than waiting until the disorder becomes severe.
At Phuket Island Rehab, the assessment process begins with a comprehensive clinical evaluation that maps the person’s specific pattern against the DSM-5 criteria, identifies co-occurring mental health conditions, assesses medical risk, and designs a treatment plan matched to the severity of the disorder. This might begin with medical detox for those with physiological dependence, followed by a therapeutic programme incorporating cognitive behavioural therapy, mindfulness-based approaches, and structured aftercare planning.
Summary
The signs that someone needs rehab are clinical, behavioural, and physical, and they map onto well-defined diagnostic criteria. Tolerance, withdrawal, failed attempts to stop, neglected responsibilities, social withdrawal, and continued use despite harm are not moral failures. They are symptoms of a neurobiological condition involving measurable changes in dopamine reward sensitivity, prefrontal cortical function, and stress-system regulation. Recognising these signs is the necessary first step, and approaching the person with empathy, specific observations, and compassion is more effective than confrontation. Early intervention produces better outcomes, but it is never too late for treatment to help.
“The moment a family decides to learn about these signs and have this conversation, the dynamic has already shifted,” says Dr. Ponlawat Pitsuwan. “They have moved from hoping the problem will resolve itself to actively seeking a solution. In my experience, that shift in the family system, from passive worry to informed engagement, is one of the strongest predictors that the person will eventually accept help. It may not happen today. But when the door is opened with understanding rather than judgment, people walk through it.”
Frequently Asked Questions
How do you know if someone needs rehab vs. just cutting back?
The distinction lies in control and consequences. If someone can set a limit and consistently stick to it without withdrawal symptoms or significant difficulty, cutting back may be sufficient. If they repeatedly try and fail to reduce use, experience withdrawal when they stop, or continue despite clear negative consequences (health problems, relationship damage, work issues), those are DSM-5 criteria for substance use disorder, and structured treatment is more appropriate than self-managed reduction.
Can you force someone into rehab?
In most jurisdictions, involuntary commitment for addiction treatment requires a court order and is reserved for extreme circumstances where the person poses an imminent danger to themselves or others. Voluntary treatment has significantly better outcomes than coerced treatment because internal motivation is one of the strongest predictors of engagement and completion. The CRAFT method trains families to create conditions that increase the likelihood of voluntary acceptance.
What is the difference between an intervention and CRAFT?
A traditional Johnson Intervention involves a group confrontation where family and friends read prepared statements and present treatment as a non-negotiable demand. CRAFT is a family-training approach that teaches communication skills, positive reinforcement of sober behaviour, allowing natural consequences, and strategically suggesting treatment at receptive moments. Clinical research has shown that CRAFT results in higher treatment engagement rates (approximately 64 per cent) than the Johnson Intervention (approximately 30 per cent).
At what point does drinking become a clinical problem?
Under the DSM-5, meeting just two of the eleven criteria within a twelve-month period qualifies as mild alcohol use disorder. Common early criteria include drinking more than intended, unsuccessful attempts to cut back, and craving. You do not need to have severe physical withdrawal or major life consequences to have a diagnosable, treatable condition. Early identification and intervention produce the best outcomes.
Should I wait for a “rock bottom” before suggesting rehab?
No. The concept of “rock bottom” is a harmful myth. Research consistently shows that earlier treatment entry is associated with better outcomes, fewer medical complications, and less damage to relationships, careers, and finances. Waiting for a crisis increases the severity of the disorder, the depth of neuroadaptive changes, and the risk of irreversible harm including overdose, organ damage, or death. Every stage of severity is a valid entry point for treatment.
How do I help someone who refuses to admit they have a problem?
Denial is a common feature of substance use disorder, driven partly by the neurobiological changes that impair self-awareness (anosognosia, mediated by prefrontal cortical dysfunction) and partly by fear and shame. The most effective approach is to avoid arguing about whether they “have a problem” and instead focus on specific, observable behaviours and their consequences. Express concern without labelling. Maintain boundaries. Seek support for yourself through Al-Anon, CRAFT training, or individual therapy. And keep the door to treatment open by periodically, calmly, offering it as an option.
Related Reading
You may also find these articles helpful: how addiction rehab actually works, what to say to someone struggling with addiction, and the four stages of addiction recovery explained.
Sources
American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). 2013.
Meyers, R.J. and Smith, J.E. “Clinical Guide to Alcohol Treatment: The Community Reinforcement Approach.” Guilford Press.
National Institute on Drug Abuse (NIDA). “Principles of Drug Addiction Treatment.” nida.nih.gov
Signs of addiction · DSM-5 substance use disorder · eleven diagnostic criteria · impaired control · social impairment · risky use · tolerance · withdrawal · CRAFT intervention · Johnson Intervention · motivational interviewing · Prochaska and DiClemente · transtheoretical model · D2 receptor downregulation · prefrontal cortex dysfunction · incentive salience · anosognosia · dorsal striatum · GABA-glutamate imbalance · alcohol use disorder · medical detox