Is it normal to have forehead wrinkles at 17 years old?
Generally speaking, whether it is normal to have forehead wrinkles at age 17 depends on the cause and severity of the wrinkles. If there are concerns or discomfort, it is advisable to seek medical advice promptly. The detailed analysis is as follows:

If the forehead wrinkles result from frequent facial expressions such as raising eyebrows or frowning, appear faint, and are only noticeable during expressions, with tight and elastic facial skin, they are usually considered normal. Young skin is thin and delicate, making dynamic wrinkles more likely to form during expressive movements. As one ages and skin elasticity improves, these lines may gradually fade.
If the forehead wrinkles are deep and clearly visible even when the face is at rest, accompanied by dry, rough skin lacking luster, or if the individual has picky eating habits leading to nutritional imbalances, this may be related to dehydration or insufficient collagen. Such cases require attention, as long-term neglect could affect overall skin health, necessitating timely adjustments in skincare routines and diet.
If forehead wrinkles remain prominent even without facial expressions, or are associated with abnormally rough skin and loss of elasticity, a medical evaluation is recommended to rule out underlying pathological causes. Daily care should include sun protection, avoiding exaggerated facial expressions, maintaining adequate hydration, and using moisturizing products containing hyaluronic acid and vitamin E. While there's no need for excessive anxiety, persistent worsening of wrinkles should prompt consultation with a dermatologist.