Heroin addiction symptoms
Read more about the symptoms of heroin addiction and how it develops over time.
Find out more about Priory's addiction services and start your recovery today.
Heroin addiction develops when someone becomes physically and psychologically dependent on heroin, a powerful opioid drug. Dependence causes changes in the brain that create intense cravings, making it very hard to stop using.
Symptoms can be physical, behavioural or psychological in nature, and range from anything from extreme cravings to mental health issues like anxiety.
Recognising the signs early can make a big difference. Whether you’re worried about yourself or someone you care about, knowing what to look for is the first step towards getting help.
At Priory, we provide expert, confidential support to help people overcome heroin addiction and take back control of their lives.
Early signs of heroin addiction
Addiction often starts with subtle changes in thoughts, feelings and behaviour.
Emotional and behavioural signs may include:
- Craving heroin and obsessively thinking about the next dose
- Using more often or in higher amounts than intended
- Intense mood swings or emotional numbness
- Feelings of anxiety or depression
- Prioritising heroin over hobbies, work, or relationships
- Withdrawing from friends and family
- Engaging in risky or impulsive behaviour
Early warning signs in others may include:
- Personality changes such as irritability, paranoia or agitation
- Loss of motivation or interest in usual activities
- Acting secretively, dishonestly, or manipulatively
- Neglecting responsibilities at home, work, or with children
- Financial issues, such as missing money, debts, or borrowing frequently
Long-term symptoms of heroin addiction
The longer heroin use continues, the more damage it causes to both physical and mental health.
Physical symptoms may include:
- Collapsed veins from injecting
- Frequent infections or abscesses
- Noticeable weight loss and poor hygiene
- Chronic constipation
- Heart problems or damaged valves
- Liver or kidney disease
- Breathing difficulties or lung complications
Psychological symptoms may include:
- Memory loss and poor concentration
- Worsening anxiety or depression
- Increased risk of other mental health disorders
- Over time, tolerance develops, meaning more heroin is needed to feel the same effect and dependence sets in, making it even harder to stop without support.
Signs of a heroin overdose
Heroin overdose can happen at any stage of use, even with small amounts. It’s a medical emergency that requires immediate help.
Signs of overdose include:
- Very slow or stopped breathing
- Unconsciousness or inability to wake up
- Pinpoint pupils
- Blue lips or fingertips
- Cold, clammy skin
- Weak pulse or low blood pressure
- Gurgling or choking sounds
If you suspect an overdose, call emergency services immediately. With quick action administered by a professional, naloxone can reverse the effects and save a life.
It’s important to understand the difference between heroin withdrawal symptoms and overdose. Withdrawal causes distressing symptoms like sweating, shaking or nausea when someone hasn’t taken heroin, but it is rarely life-threatening. Overdose, however, can quickly be fatal without emergency treatment.
How heroin addiction progresses over time
Heroin addiction often develops in stages:
- Tolerance – needing more heroin to get the same effect
- Dependence – relying on heroin to feel ‘normal’
- Addiction – losing control over how much or how often you use
As addiction worsens, health, work, financial and legal problems usually increase. These effects often become visible to others, making the problem harder to hide.
What to do if you recognise these symptoms
If you’re concerned about your heroin use, or that of someone close to you, it’s important to take action.
- Talk to someone you trust – sharing your concerns can help reduce shame and provide vital emotional support
- Approach loved ones with care – use a calm, non-judgemental tone and focus on offering help, not blame
- Explore support options together – this could include local services, charities, or professional treatment
Free help is available through organisations such as Talk to Frank, the NHS, and community support groups.
Private treatment is also available for those seeking fast access and a structured recovery plan.
Start your recovery from heroin addiction
You don’t have to face heroin addiction alone. With the right treatment and support, recovery is possible.
At Priory, we offer a free, confidential addiction assessment and tailored treatment plans across our nationwide network of rehab facilities. Our programmes include:
- Detox – safe, medically supervised withdrawal
- Rehab – intensive inpatient care in purpose-built facilities
- Residential - a structured, therapeutic programme in a calm, compassionate environment without physical care
- Aftercare – ongoing support to maintain long-term recovery
Book your free addiction assessment today and take the first step towards a healthier future.
