It is not uncommon to go through a period where libido or interest in sexual activity goes down for no reason. This particular type get better on its own.
In other cases it could be due to one or more of these reasons
- due to some medicine specially high bp medicines
- low
testosterone level
- low brain dopamine level
- stress anxiety or depression
- some other illness like
diabetes high bp
- obesity
- too sedentary life
- poor or disturbed sleep
- excess of alcohol
- discord in relationship
The condition can be very well treated. Treatment is directed to cause. In addition one can get better by lifestyle changes sex counseling and sex therapy. Other treatment like acupuncture and homeopathy are very effective.