I have a numb tingling feeling on the right side of my belly button. it's not painful but uncomfortable. what can it be?

Mind perception of: signals from skin to brain, Study: https://www.google.com/search?q=homonculous. We learn to interpret sensations over time by association & practice, routinely taking the fantastic complexity for granted. Additional issue: whatever we mentally focus on usually increases in perceived importance (within our mind), especially if associated with fear vs pleasure (a key basis for addictive behaviors).