How to treat low testosterone is one of the first questions that men diagnosed with hypogonadism ask. Some of the symptoms of hypogonadism, which is also known as low testosterone, are a reduced sex drive, erectile dysfunction, and a loss of muscle and bone density. Although age is one of the causes of low testosterone, it is not the only cause. Low testosterone can be caused by injury, diseases such as diabetes, and by certain medications. There are no home remedies to treat low testosterone, but a doctor can put you on the correct path towards treatment.