Is it normal for a 21-year-old female to grow 3 cm taller?

In general, whether it is normal for a female to grow 3 cm taller at the age of 21 should be evaluated under a doctor's guidance, depending on whether an underlying medical condition is involved. Specific details are as follows:

1. Normal

If a person has relatively delayed development and their epiphyseal growth plates have not yet fully closed at age 21, combined with genetic factors contributing to naturally taller stature, and there are no other unusual physical discomforts associated with the 3 cm height increase, this is generally considered normal and does not require special treatment.

2. Abnormal

If the increase in height is accompanied by symptoms such as acromegaly (enlargement of hands, feet, and facial features), hair loss, fatigue, or genital atrophy, it is usually considered abnormal and may indicate a condition such as gigantism. Medical consultation is recommended, and treatment may involve medications such as cabergoline tablets, octreotide acetate injection, or bromocriptine mesylate tablets, as directed by a physician.

In addition, attention should be paid to diet, focusing on low-sugar, low-fat, high-fiber, and high-protein foods.