Symptoms of early sexual maturity in boys usually include accelerated growth, development of sex organs and secondary sexual characteristics, and accompanying symptoms. 1. Accelerated growth: due to the secretion of relevant hormones or the increase of exogenous acquisition, the body grows faster, resulting in rapid increase in height and weight. 2. Development of sex organs and secondary sexual characteristics: patients will have enlarged testicles and penis, increased penile erection, even sperm production, increased muscle mass, increased subcutaneous fat, growth of pubic hair, and the appearance of laryngeal knots, beard, axillary hair, and so on. 3. Accompanying symptoms: those with precocious puberty due to intracranial tumor may show symptoms of increased cranial pressure, visual field defect, headache and dizziness. It is recommended to go to the hospital as soon as possible for examination, such as sex hormone examination, to clarify the cause of the disease and follow the doctor’s instructions to avoid delaying the condition.