I've tried a lot of things to stop biting my nails but with no success. If there's something you have tried and worked, please share your advice and good practices.
Dab hot sauce on your nails and let it dry out, this should cause you to stop very fast. This is a very easy method but can be painful. If you find out that you actually enjoy the pain, there are some nail polishes with denatonium benzoate (a very bitter substance).
One needs to control himself on this.
Best way to control - keep your mind focused on "I don't bite my nails" Keep reminding yourself this statement.
You can even post it on your bedroom wall, desk, washroom mirror or any place where you have your visual focus more.
Hope this helps.
I found a very good solution. I work in front of a PC, so I fixed in the screen a paper written "STOP BITING NAILS". So I look to it every time and I don't bite my nails accidentaly as I used to do.
Wear a rubber band around your wrist. Every time you find your hand near your mouth, snap the rubber band(hard!) on your wrist.
Also, keep a file handy for whenever you feel that a nail is out of shape.
I have just almost finished dealing with this for my 5 year old son. So here is a technique that worked.
"Mavala Stop" is a clear nail coat. Believe me when I say the taste is so yucky that there is no way but to stop putting your nails into the mouth. It took my son couple of weeks to get rid of a habit that was destroying his nails and also bothering us quite a bit. The coat wears off in about 3 days, so replenish it until the habit stops or resurfaces. The customer reviews describe more and no doubt it is the number one product on Amazon for 'Nail growth'. My son's nails are growing back healthily once again. Good luck.
Biting your nails is likely be just a symptom of something else that is eating at you.
My parents have always wanted me to stop it, gave me nail coat (which were not strong enough I guess), tried punishing me, etc. - none of those worked.
20 years later I am still doing it, but at least now I know the background reason (which is not going to be fixed easily, but that's for another site).
Tried many of the suggestions here and the only thing that worked long term was taking supplemental vitamin D3. Your doctor can check your D levels. I take 2000 IU per day. Nails got stronger and the urge to pick at them went away. It was a totally unexpected benefit.
I bit my fingernails for about 30 years. I didn't enjoy it but seemed powerless to stop. I would do it without conscious thought.
Finally, two years ago after seeing my kids play with fidget spinners I realized that if my fingers were always busy then I couldn't bite my nails subconsciously. I bought a fidget cube and for two months it was either in my hands or in my pocket.
After getting the fidget cube I never bothered my nails again. After two months I no longer needed the fidget cube and gave it to my kids.
just look at the contents of your fingernails under a microscope, the sight of it should stop you pretty fast.
Don't just clip them, but file them as well. The nicer your nails are, the more of a reason you will have not to bite them. Increase your care for them until you no longer bite them.