The most common signs of testicular cancer are lumps, swelling and/or pain in a testicle or in your scrotum. Usually lumps are painless or mildly uncomfortable, so don’t wait to feel pain before seeing a urologist or family doctor. Swelling or enlargement of a testicle or your scrotum can happen without a lump present, so if you’re experiencing anything out of the ordinary, you should have it checked out by a urologist or see your family doctor. 
It’s important to know that some of the common symptoms of testicular cancer may not mean you actually have a cancer diagnosis. That said, if you have any of the symptoms mentioned above, we recommend you see a urologist or doctor immediately .
If left unchecked, testicular cancer can spread to other parts of the body working its way up your torso. If it spreads some guys will feel pain in their lower backs as it moves to their lymph nodes. If it reaches the lungs, symptoms such as shortness of breath, chest pain, or a cough—eventually coughing up blood—can occur. 
Don’t wait for symptoms to worsen before you see your doctor. Even if you have testicular cancer, an early diagnosis can save your life.
National Cancer Institute, 2014. http://www.cancer.gov/cancertopics/pdq/treatment/testicular/Patient