Side Pain: Kidney Issues or Muscle Strain?

Two questions?

Hello, Doctor.
I would like to ask about some symptoms I experienced after waking up yesterday.
I feel a slight pain on both sides of my lower back, and I'm wondering if this could indicate a kidney issue or if it's more likely related to muscle strain.
I've been feeling a bit sore in that area after some recent masturbation, and sometimes when I stretch, I feel a mild discomfort that goes away after a while.
I'm a bit worried that it might be a kidney problem or kidney stones.
I asked my sister, who is studying medicine, and she told me not to scare myself unnecessarily, but I didn't mention the masturbation part.
However, the more I Google, the more alarming it becomes.
😱
Additionally, I've been frequently using alcohol spray, and today I accidentally sprayed it on my sister.
She mentioned that spraying like this could lead to alcohol poisoning and that I might need naloxone.
She then left for school, telling me to look it up myself.
I found that naloxone is used for acute alcohol poisoning, and I'm curious if using alcohol spray frequently, especially before eating or when I get home, could actually lead to poisoning, or if my sister is just joking with me.
When I asked her again, she just said to wash my hands with soap and not to worry.
Thank you, Doctor, for your help, and I wish you good health.

Xingxing, 10~19 year old female. Ask Date: 2021/01/20

Dr. Hong Yuanbin reply Internal Medicine

Hello, based on your description, the lower back pain is likely caused by a muscle strain in the lumbar region, which is usually due to improper posture.
It is uncertain whether it is related to masturbation, but it should not be related to kidney stones.
I recommend allowing your lower back to rest and applying heat; you should see improvement in a few days.
Regarding the use of alcohol, as long as it is for external use, such as hand sanitizing, there is no risk of alcohol poisoning since it evaporates after some time.
Please don't worry.
Thank you for your inquiry.

Reply Date: 2021/01/20

More Info

When experiencing side pain, particularly in the lower back region, it is essential to differentiate between potential kidney issues and muscle strain. Based on your description, the pain you feel upon waking, which is sometimes accompanied by a mild ache when stretching, could likely be attributed to muscle strain rather than a kidney problem.
Kidney pain typically presents as a more severe, localized pain that may radiate to the abdomen or groin, especially if there are issues like kidney stones or infections. If the pain were related to kidney issues, you might also experience other symptoms such as changes in urination (like frequency or pain during urination), fever, or nausea. Since you mentioned that the pain is mild and tends to resolve quickly, it is less likely to be related to kidney problems.

Muscle strain can occur due to various factors, including physical activity, poor posture, or even sleeping in an awkward position. If you've recently engaged in activities that involve repetitive motions or strain, such as masturbation, it could lead to muscle soreness. Stretching or sudden movements can exacerbate this discomfort. It’s also worth noting that the muscles in the lower back can become tense or strained from various activities, leading to the sensations you described.

Regarding your concern about alcohol exposure, it’s important to clarify that using alcohol-based sanitizers or sprays on your skin is generally safe and does not lead to alcohol poisoning. Alcohol poisoning typically occurs from consuming large quantities of alcohol, not from topical application. Your sister's comment about naloxone is likely a misunderstanding; naloxone is used to reverse opioid overdoses, not alcohol-related issues. If you are using alcohol-based products frequently, ensure they are used in well-ventilated areas and avoid ingesting them.

In summary, the mild side pain you are experiencing is more likely related to muscle strain rather than kidney issues, especially if there are no accompanying symptoms such as changes in urination or severe pain. If the pain persists or worsens, or if you develop new symptoms, it would be prudent to consult a healthcare professional for a thorough evaluation. As for the use of alcohol-based products, continue to use them safely, and there is no need for concern regarding alcohol poisoning from topical use. Always prioritize good hygiene practices, such as washing your hands with soap and water, especially before eating or after being in public spaces.

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