Losing interest in sex, or having less desire than you may have had before, can occur at various times of life and is often normal. However, if this has lasted for more than six months it may be worth discussing with a doctor.
Possible underlying causes include low testosterone levels (hypogonadism), thyroid disease, diabetes, stress, anxiety, depression, some medications, alcohol, recreational drugs, and more. Also, this problem does become more common with age, but should be not be seen as an inevitable part of ageing.
There are several options available to manage the issue of libido, and we would be happy to discuss these with you at our clinic. The Nuffield Health Brighton Hospital (details below) is well located for us to consult with people from Brighton & Hove, Sussex, and further afield.