 [ Symptoms ] is the smell of cigarette smoke considered to be secondhand smoke [ Disease ] your acne may need treated either by your primary care medical provider or a good dermatologist treatment will vary based on the severity and type of acne lesions that you have your horizontal lines are probably striae and yes they are considered stretch marks even if you are not getting taller or stretching in that direction this is a guess however since i can not see them there are other reasons that can cause striae but i do not know your medical history you can read about striae on the internet striae and acne are not associated