There is no way of knowing whether pimple prevention is necessary until the dreaded pimples actually crop up and refuse to go away on their own. However, it is a safe bet that most teenagers and a high number of adults are going to have pimples at some point and to some degree.
If the problem has been traditionally acute in previous family generations, you can count on having it, too. If the problem looms on the horizon and appears as a genetically encoded time bomb, some preventive measures are definitely in order before the pimples develop. And if pimples have ever plagued you in the past, they might come back in the future, too.
The most basic form of pimple prevention is hygiene and prophylactic (preventive) skin care. Regular washing of endangered or affected areas with mild soap is a must. Such soap need not necessarily contain any chemicals designed to prevent pimples