Once when running with my friends which includes a primary care physician, a sports medicine doctor and physical therapist, I mentioned I had some lower back pain and asked if it could be something serious like a compressed disc. One of the doctors said, "I guarantee that we all have had, do have or will have a compressed disc". Multiple online sources report that compressed or herniated discs are "very common" for people over the age of 40, with men having a higher prevalence than women.
Btw, that conversation was before I fell from a ladder and fractured my fourth lumbar disc. I am fully recovered and I don't suffer any back pain or have back issues.
A herniated disk is also known as a slipped, ruptured or bulging disk. According to the Cleveland Clinic, itís one of the most common causes of neck, back and leg pain. Most of the time, herniated disks heal on their own or with simple home-care measures. Herniated disks get better on their own over time or with nonsurgical treatment for 9 out of 10 people.
If you had a herniated disc and you lived in the UK you would be advised to exercise and take NSAIDs (ibuproen). Before you could see a NHS doctor, you'd have to be incontinent, unable to urinate/defecate and/or have a loss of feelings in your lower extremities.