Being lonely isn't a mental health issue; However, the two are inextricably related. A mental health issue increases the chance of being depressed.  For instance, certain individuals may be confused about specific mental health conditions, and you might have difficulty talking with them about your issues. Being lonely can be detrimental to the health of your mind, particularly in the case of feelings that last over a long period.  A few studies suggest that loneliness can be linked with an increased risk of mental health issues like depression and anxiety and poor self-esteem, sleep disorders, and more stress.