Hip bursitis — an inflammation between your thighbone and nearby tendons — is commonly diagnosed when patients have pain on the outer side of the hip. However, several other conditions can cause similar pain, and require different treatments. "Doctors often assume that pain on the outer side of the hip is due to bursitis. But 90% of the time, it's not bursitis," says Dr. Lauren Elson, a physiatrist with Harvard-affiliated Massachusetts General Hospital.
Lumbar radiculopathy: Lumbar radiculopathy is nerve irritation that is caused by damage to the discs between the vertebrae. Damage to the disc occurs because of degeneration ("wear and tear") of the outer ring of the disc, traumatic injury, or both. As a result, the central softer portion of the disc can rupture (herniate) through the outer ring of the disc and abut the spinal cord or its nerves as they exit the bony spinal column. This rupture is what causes the commonly recognized "sciatica" pain of a herniated disc that shoots from the low back and buttock down the leg. Sciatica can be preceded by a history of localized low-back aching or it can follow a "popping" sensation and be accompanied by numbness and tingling. The pain commonly increases with movements at the waist and can increase with coughing or sneezing. In more severe instances, sciatica can be accompanied by incontinence of the bladder and/or bowels. The sciatica of lumbar radiculopathy typically affects only one side of the body, such as the left side or right side, and not both. Lumbar radiculopathy is suspected based on the above symptoms. Increased radiating pain when the lower extremity is lifted supports the diagnosis. Nerve testing (EMG/electromyogramspina bifida
Trauma:  Sometimes trauma may cause your low back pain. There is no mystery here-a fall, a car accident, or trauma during athletics can all cause low back muscle strains. While physical therapy can help your back pain after trauma, it is always a good idea to check in with your doctor after a traumatic event to ensure that no major damage is causing your pain.
Congenital bone conditions: Congenital causes (existing from birth) of low back pain include scoliosis and spina bifida. Scoliosis is a sideways (lateral) curvature of the spine that can be caused when one lower extremity is shorter than the other (functional scoliosis) or because of an abnormal architecture of the spine (structural scoliosis). Children who are significantly affected by structural scoliosis may require treatment with bracing and/or surgery to the spine. Adults infrequently are treated surgically but often benefit by support bracing. Spina bifida is a birth defect in the bony vertebral arch over the spinal canal, often with absence of the spinous process. This birth defect most commonly affects the lowest lumbar vertebra and the top of the sacrum. Occasionally, there are abnormal tufts of hair on the skin of the involved area. Spina bifida can be a minor bony abnormality without symptoms. However, the condition can also be accompanied by serious nervous abnormalities of the lower extremities.
Take a step back and think about where you spend most of your day. If you're a young athlete, you probably spend most of your time at school or maybe work or practice and  even a little time at home, if you're lucky. Now think about what position your body is in during those periods. I would bet that you spend most of your day sitting down. You may walk to class or run in practice, but the majority of your day is spent in a seated position.
If all you’ve been doing for your lower body lately is the occasional lunge, it’s time to mix up your routine. “Our bodies move in different directions, not in one direction, so it’s important to mimic that during cross-training,” Whitesides says. That’s why instead of relying on a pattern of “lunge-squat-repeat” — you might want to throw some plié squats, or leg lifts into the mix.

The hips are one of those body parts that most of us don't really think about until they're bothering us. When you hit the gym, strengthening your hip muscles specifically probably isn't high on the agenda. But if you're someone who spends most days sitting, you're likely familiar with that hip ache and tightness that comes along with it. Maybe you've even started doing some hip stretches to combat that. But actually strengthening the hip area is something that will not only make you feel better, but help you move better, too.

If your hips are killing you, you probably spend a lot of time sitting – in the car, at work, on that spinning seat – which puts your hips in near-constant “flexion”, says Cori Lefkowith, NASM-certified personal trainer and owner of Redefining Strength in Orange County, California. Even running involves a repetitive flexion movement that can cause pain.

^{A complete medical history and physical exam can usually identify any serious conditions that may be causing the pain. During the exam, a health care provider will ask about the onset, site, and severity of the pain; duration of symptoms and any limitations in movement; and history of previous episodes or any health conditions that might be related to the pain. Along with a thorough back examination, neurologic tests are conducted to determine the cause of pain and appropriate treatment. The cause of chronic lower back pain is often difficult to determine even after a thorough examination.}
In this study, one patient with sciatica was sent for ten MRIs, which produced 49 distinct “findings,” 16 of them unique, none of which occurred in all ten reports. On average, each radiologist made about a dozen errors, seeing one or two things that weren’t there and missing about ten things that were. Yikes. Read a more detailed and informal description of this study.
Some of these red flags are much less red than others, especially depending on the circumstances. For instance, “weight loss” is common and often the sign of successful diet! (Well, at least temporarily successful, anyway. 😃) Obviously, if you know of a harmless reason why you have a red flag symptom, it isn’t really a red flag (duh!). But every single actual red flag — in combination with severe low back pain that’s been going on for several weeks — is definitely a good reason to get yourself checked out.