Left Side Waist Pain: Causes and When to Seek Help - Internal Medicine

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There is a slight pain in the left side of the lower back?


Hello doctor, for the past couple of days, I've experienced a sudden mild pain in the flesh above the bone on my left lower back near the waist.
However, it has eased after I twisted my waist.
My family says it might be due to my new pants being too tight and that I shouldn't worry too much.
I would like to ask if this pain could be related to kidney issues or appendicitis, or if it is likely just a muscle strain.
Thank you, doctor!

Rou Rou, 10~19 year old female. Ask Date: 2020/05/11

Dr. Hong Yuanbin reply Internal Medicine


Hello, the appendix is located on the right side, so it is unlikely to be the left kidney.
While acute kidney inflammation typically accompanies fever and urinary discomfort, based on your description, it seems you do not have these symptoms.
The most likely speculation is a muscle injury, possibly due to a minor strain, compression, or impact.
Usually, rest or heat application can help improve the condition.
Thank you for your question.

Reply Date: 2020/05/11

More Info


Understanding left side waist pain can be quite complex, as there are numerous potential causes ranging from muscular issues to more serious medical conditions. Based on your description of experiencing sudden mild pain in the left side of your waist, it is essential to consider various factors to determine the underlying cause.

Firstly, the pain you are experiencing could indeed be muscular in nature. If you have recently engaged in activities that require twisting or bending, or if you have been sitting in a position that places strain on your back, it is possible that you have strained a muscle. Tight clothing, such as new pants that are too snug, can also contribute to discomfort by restricting movement and putting pressure on the muscles and nerves in that area. In such cases, the pain may improve with gentle stretching, rest, or over-the-counter pain relief medications.

However, it is also important to consider other potential causes of left side waist pain. For instance, kidney-related issues could manifest as pain in the lower back or side. Conditions such as kidney stones or a kidney infection can cause significant discomfort, often accompanied by other symptoms like changes in urination, fever, or nausea. If you notice any of these additional symptoms, it would be prudent to seek medical attention.

Another possibility is that the pain could be related to gastrointestinal issues, such as appendicitis or diverticulitis. While appendicitis typically presents with pain in the lower right abdomen, in some cases, individuals may experience referred pain that could be felt on the left side. Diverticulitis, which involves inflammation of pouches that can form in the colon, can also cause localized pain, often accompanied by changes in bowel habits or fever.

Given the variety of potential causes, it is crucial to monitor your symptoms closely. If the pain persists, worsens, or is accompanied by other concerning symptoms such as fever, significant changes in bowel or urinary habits, or if you experience severe pain that does not improve with rest, it is advisable to seek medical evaluation. A healthcare provider can perform a thorough examination, possibly including imaging studies or laboratory tests, to determine the exact cause of your pain.

In summary, while your left side waist pain may be due to muscle strain or tight clothing, it is essential to remain vigilant for any additional symptoms that could indicate a more serious condition. If in doubt, consulting with a healthcare professional is always the best course of action to ensure proper diagnosis and treatment. Remember, early intervention can often lead to better outcomes, so do not hesitate to seek help if your symptoms do not improve or if you have any concerns about your health.

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