Hello Dear. Any number of things, some physical and some psychological. Sometimes it’s both. Physical issues that can cause low libido include low testosterone, prescription medicines, too little or too much exercise, and alcohol and drug use. Psychological issues can include depression, stress, and problems in your relationship. Depending on the cause, possible treatments include: 1. Healthier lifestyle choices. Improve your diet, get regular exercise and enough sleep, cut down on the alcohol, and reduce stress. 2. Change to a new medication, if the one you’re on is affecting your libido 3. Testosterone replacement therapy ( Counseling Your doctor may recommend therapy if the issue is psychological. In many cases, a low libido points to a desire for a closer connection with your partner -- one that isn’t sexual, but still intimate. It can help to talk through these issues with a therapist, either alone or with your partner. If the issue is depression, antidepressants can help. Some of them actually lower your sex drive, though. What about the meds you may have seen in TV and magazine ads, like Cialis, Levitra, and Viagra? These don’t boost libido. They help you get and keep erections. Hope i have answered your question. Feel free to contact me if you have any more questions. I ll be glad to help you. All the best With warm regards Dr Sanjay Kini