I have a lip piercing and i got a hard bump on the outside of my lip it's a little tender?

Infection: What you described suggests infection at the site of the piercing. It would help to remove the piercing. If that does not reduce the problem in a couple of days, it would be prudent to see a doctor. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. Get HPV vaccine.