The answer is obsessive-compulsive disorder. Compulsive and usually unwanted thoughts and actions (rituals) are the common features of the disorder. Although OCD is usually associated with repeating the actions over and over, such as obsessive hand-washing or having to flick a light switch a certain number of times, many people who suffer from OCD struggle with frequent unwanted thoughts and images.
It can help you keep track of your fitness.
Answer: The lungs
Explanation:
It affects lungs due to breathing it in thats when it causes the most harm are lungs weak to things in the air. So when the smoke goes in the lungs it could inside burning and many other things one of the most known lung cancer.