Hello i have gone through your query. a bump on the palate (roof of mouth) can be due to various reasons: Irritation due to food inflammation of incisive papillas smoker s palate (nicotine stomatitis) Torus palatinus or Exostosis Mucous Cysts Canker Sores plz mention your age.do you have any habit of smoking? irritation can occur due to burning after drinking or eating something that was too hot or by eating very spicy food. trauma to the tissue can cause micocele hormonal changes, poor diet and stress can also cause cancer sores. if i were ur treating doctor i wud suggest you to watch the bump for 3-4 days to see any change. quit any bad oral habit avoid taking too spicy and hot food rinse your mouth with a antiseptic mouthwash if the condition persist you sud visit a dentist to check for the other possiblities Hope this ans helps Regards Dr. Shesh