When using a Tynor scrotal supporter, it is generally recommended to wear it directly on the skin rather than over underwear. This ensures better support and comfort. Wearing it directly on the skin helps the supporter stay in place and provides the necessary support to the scrotal area, which is important especially after surgery or injury.

However, if you find it more comfortable or if your healthcare provider advises, you can wear a thin, seamless layer underneath to prevent skin irritation. Always ensure the supporter fits well—not too tight or too loose—to avoid discomfort.

If you have any specific medical conditions or concerns, it's best to follow the advice of your doctor or the instructions provided with the product.