The first symptom is a lot of pain. That may be followed by nausea and sometimes vomiting. Fortunately, the testicles are made of spongy material that typically absorbs the shock without a lot of damage. They are also covered by a tough material that protects the tissue inside. With a typical injury, the pain and nausea usually ease in about an hour. And with most injuries, there is no damage to the testicles' ability to produce sperm or the ability to have sex.