Dental abscesses have been implicated in low sperm counts. Symptoms STD's may cause thick discharge, pain on urination, or difficulty urinating or ejaculating because of scar tissue. Some STD's have no obvious symptoms. Pain and swelling may accompany any infection that has reached the testicles. In the case of STD's, prevention is the best treatment.
Condoms can help reduce the risk of infections.
Many STD's are treatable with antibiotics. In the cases where STD's are not the culprit, good oral hygiene can prevent oral bacteria from traveling through the bloodstream and invading the testicles. In terms of other illnesses and viruses, once treated, sperm production usually returns to normal. Trauma Explanation Injuries to the testicles can damage the sperm making machinery. Symptoms Sports injuries and torsion cause obvious pain.