This does not hurt or itch or smell bad. Pimples or acne are a common problem. Some suggestions are to wash with plain soap, not eat foods with lots of fat, not use skin moisturizers, and use lotions with benzoyl peroxide which can be bought without prescription at a drug store. A doctor may also be able to prescribe medication. Body odour is caused by perspiration.
Many people stop it by washing often with regular or deodorant soap and using deodorants.
Girls usually grow quickly between 10 and 13. After their periods start, most grow about another inch or 3 centimeters. Most reach their adult height by age 16. Puberty may be a time of strong sexual feelings and fantasies. These feelings may be confusing or a worry or very pleasant.