An erect penis of only 11.5cm may be normal. When a man’s penis is erect, the normal length can reach 8~15cm, while in the soft state, the length of the penis can reach 5~6cm, according to the data analysis of the current erection, the length of the penis is normal. If the current erection length is 11.5cm, it usually does not affect sexual life. However, men who are not too satisfied with their penis length can choose to go to the hospital for surgical procedures to correct it, such as penis lengthening, but the specific effect varies from person to person and needs to be treated under the guidance of a professional physician. Penis in the erection of the normal condition without adverse reactions, such as pain, congestion, edema, etc., if similar abnormalities need to consult a doctor in time.