Hi,
The most common causes of itchy skin rash near the scrotal area include: eczema, irritation (non-infective intertrigo), superficial fungal infection (e.g tinea cruris, candidiasis) and superficial bacterial infection (e.g erythrasma)
Based on the appearance of the rash, your doctor may suspect the cause or perform additional skin tests to confirm the cause. Once confirmed, your doctor will be able to prescribe the appropriate treatment for you.
Hope this helps!
