I saw some people suffer from this kind of self harm. You are not alone.  
( People are embarrassed about these habits. I KNOW!)  


It gave me confidence to share and possibly help others who have the same problem!

  
I actually used to bite my fingers alot. (still do a bit)  
I used to bite my lip/inner cheek until blood sometimes.   
I know it is bad and i regret it always! IT HURTS. lol  
I do not smoke or drink(a bit vodka) ... so this is my only way to relief major stress.  
Otherwise i just binge eat because of past traumas. 

Anyway... i found a good solution that did make my situation better over times was to find something to chew on. Something that isnt food or snacks. Just an object that you can chew on whenever you feel stressed out.   
**Sensory chew toys!!!**   
They work perfect for this! Like a necklace you can wear and then use whenever you feel the urge to indulge in your bad habit.   
They also come in many shapes and colors! So they can be aesthetic too!  


Over time you condition yourself to chew on your toy instead! Just wash it regulary! =)

I hope someone finds this helpful.