But according to a 1990 study, 56% of bipolar patients also have a substance abuse problem, which can make treatment even more difficult. Experts say that some bipolar patients are known to self-medicate with drugs or alcoholthough it's not recommended. In fact, they say, it does more harm than good.
A Meniscus Tear. The two most common causes of a meniscus tear are due to traumatic injury (often seen in athletes) and degenerative processes (seen in older patients who have more brittle cartilage). It is not uncommon for the meniscus tear to occur along with other damage inside the knee.
When to see a doctor. Contact your doctor if your knee is painful or swollen, or if you can't move your knee in the usual ways. Causes. Torn meniscus. Torn meniscus The meniscus is a C-shaped piece of tough, rubbery cartilage that acts as a shock absorber between your shinbone and thighbone. It can be torn if you suddenly twist your knee while bearing weight on it.