Cigarette smoking and alcohol use are common among youth . As we all know that Cigarette smoking and alcohol are very harmful to human body in many ways Addiction is a complex condition it is a brain disease that is caused by many substance and can cause harmful consequence. People with addiction have an intense focus on using a certain substance such as alcohol or drugs, to the point that it takes over their life. They keep using alcohol or a drug even when they know it will cause problems. These substances can cause harmful changes in how the brain functions. It can cause harm to digestive system, lungs, liver , kidney and other external and internal parts of the body. People begin taking drugs and starts smoking for a variety of reasons to feel good (feeling of pleasure, “high”) ,to feel better (relieve stress), to do better (improve performance) curiosity and Sometimes people also try these addictions due to peer pressure. Many people experience both mental illness and addiction. The mental illness may be present before the addiction and it may get triggered afterwards. Medications are used to control drug cravings and. Therapy can help addicted individuals understand their behavior it also helps in developing higher self-esteem, to cope with stress and address other mental health problems. People should understand and stop doing such harm to their body as we all know that it can cause immense harm to our body and can change our life forever.