You should identify the cause before treating the itching. For bacterial/fungal infection using antibiotic cream can reduce itching. Over the counter ointment can be applied on the testicles during night. Always wash the private parts thoroughly after using toilet and dry them before wearing clothes. Keeping the area dry and clean is the ideal way to prevent growth of bacteria or fungus. You can always try home remedies to manage itchy testicles before visiting your physician. Apply few drops of tea tree oil on the area to manage itching. It is a powerful antifungal agent cleansing the parasites within a day or two. Add few drops of this oil on a cotton ball and rub it gently on your scrotum. By repeating this simple remedy for a week you can see considerable difference in itching.
Studying animals can help in understanding things about people. In mammals , testicles can be very big or very small in relation to the size of the animal itself. The size has to do with the amount of sperm that the male animal needs to make. Some types of male animal generally only have one sexual partner at a time and are called monogamous . Some types of animals generally live in a herd or flock where one male will have many female sexual partners. These males are called polygamous . More sperm is needed by polygamous males than by monogamous males. Polygamous males generally have larger testicles than monogamous males. The testicles grow larger to make more sperm.