3 small dry rough patches inside mouth. i touch them with my tongue they feel like sandpaper i've been smoking for a year now. what does that mean?

See a dentist: The changes in your mouth are likely a result of smoking, and could be a simple change in the surface texture, or pre-cancerous, or worse. Go have them examined by a dentist asap. And stop smoking.

Leukoplakia: 1. Possibly leukoplakia which may be pre- cancerous. 2. Could be trauma from chewing and biting your cheeks.

Stop dangerous habit: Your body is "talking" to you. Stop smoking. You, and your body, know that it's not good for you. Smoking can lead to oral cancer. Tissue changes take a long time to become cancerous, so don't panic. Just stop. Save the money you don't spend on cigs and take a nice vacation instead. At the current price of a pack, it won't take that long!