Understanding Varicocele and Male Fertility Some vein conditions can quietly affect male fertility without obvious warning signs. Varicocele occurs when the veins that drain blood from the testicles become enlarged. This can affect normal blood circulation and sometimes increase the temperature around the testicles. This temperature change may influence sperm production and sperm quality in some men. Symptoms may include scrotal heaviness, dull groin pain, or discomfort after standing for long periods. Men experiencing these concerns can consult Dr Santosh Patil in Pune for proper evaluation and guidance.