Persistent groin itching and swelling could be caused by a fungal infection, like a yeast infection, or a bacterial skin infection. Sometimes, using antiseptics like povidone-iodine (Betadine) can actually irritate sensitive skin further, causing contact dermatitis which worsens the swelling and itching. It could also represent swollen lymph nodes reacting to a local infection. Since these symptoms are worsening, please avoid applying more povidone-iodine. I gently encourage you to consult a healthcare professional. They can examine the area and prescribe the correct treatment, such as an antifungal or antibiotic cream.
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What are the possible causes of severe itching and worsening groin swelling that persists despite the application of Betadine solution?