Im boy,19. i maintain hygiene health. i wash my penis daily once. my penis foreskin and its head seem dry, not something smegma. what to do? can i apply lotion? if yes, suggest few lotions?

Keep it clean as you would any other body part. There is no value in applying lotions.

Agree with Dr. Ferguson. Unless you are using oil as a lubricant for masturbation, there is no need to apply oil to your penis. 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 and Covid vaccines. Wish you good health!