My penis was feeling irritated and numb after frequent masturbation. ive quit now for 2 weeks irritation has improved but it still feels abit numb can get erection but not a strong over time does this heal? doctor said yes but im scared?

Give it rest. It will get better. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines

It will 'heal'. Nothing to be scared about. you'll be fine.