I'm sorry to hear about the discomfort you're experiencing in your lower back and testicles after masturbating. This kind of pain can be caused by muscle strain, inflammation, or sometimes issues related to the prostate or urinary tract.

Here are some steps you can take to alleviate the pain:

• Pain Relief: Over-the-counter pain relievers like those containing aceclofenac and paracetamol can help reduce pain and inflammation. However, these should be used only as directed and after consulting a doctor.
• Warm Compress: Applying a warm compress to the lower back and groin area may help relax muscles and reduce discomfort.
• Hydration and Rest: Ensure you stay well-hydrated and avoid activities that worsen the pain.
• Gentle Exercise: Light stretching or walking can improve blood flow and reduce muscle tension.
• Avoid Excessive Strain: Moderating the frequency of activities that trigger pain may help.

Since your symptoms have persisted for several years, it is important to consult a urologist. They can perform a thorough evaluation to rule out conditions such as prostatitis, epididymitis, or other underlying issues that might require specific treatment.

If you experience severe pain, swelling, fever, or difficulty urinating, seek medical attention promptly.

Remember, personalized care from a specialist is essential for proper diagnosis and management.To narrow down potential causes, we will need some more information.I understand you're experiencing discomfort. Could you please share your age and gender with me?