* Maturity and responsibility: Can the person manage the extra care and maintenance hair extensions require?
* Parent/guardian consent: If a minor, they'll likely need permission from a parent or guardian.
* Hair health: Hair extensions can be more damaging if the natural hair is already fragile or thin.
Ultimately, the decision is up to the individual and their parent/guardian if they're a minor. It's best to discuss it openly with them and weigh the pros and cons before making a decision.