Your 7 year old can have pubic hair because he or she is going through precocious puberty.
Only a few children go through precocious puberty and develop pubic hair or other body hair so early and it's nothing to worry about.
The early pubic hair in 7 year olds and other children occurs as a result of the adrenal gland increasing the level of androgens that it produces.
The precocious puberty is due to the brain sending signals earlier than it should.
There is no other underlying medical problem or trigger.
This also can often run in families.
Less often, precocious puberty stems from a more serious problem, such as a tumor or trauma.
When a child enters puberty (the process of becoming sexual mature) too early, it's called precocious puberty, or early puberty.
Children experiencing the condition develop early sexual characteristics; in girls this means before age 8, and in boys, this means before age 9.