Those who struggle with a personality disorder have great difficulty dealing with other people. They tend to be inflexible, rigid, and unable to respond to the changes and demands of life.
Could depression actually be a form of infectious disease? â Turhan Canli. Chronic Lyme disease and its co-infections can cause depression. If we look at the cousin of Lyme disease, Syphilis, and its studies related to mental health issues, we see depression, anxiety disorders and much more.
There are several theories about the connection between IBS and stress and anxiety: 1  Although psychological problems such as anxiety do not cause IBS, people with IBS may be more sensitive to emotional troubles.