Yes, you can safely use the 10% Betadine (povidone-iodine) solution by diluting it to match the 5% strength. To make 5 ml of the 5% solution, simply mix 2.5 ml of the 10% Betadine with 2.5 ml of sterile water or normal saline. This ensures you get the exact concentration you need without irritating your skin. Please be gentle during application. If this is for a highly sensitive area, like your eyes, please consult your doctor before applying it.

Since the boil on his waist has been bleeding and leaking pus for a week despite using Betadine, it likely requires professional medical evaluation. He may need a prescription for oral antibiotics or a simple, safe drainage procedure done by a doctor to help it heal properly. For now, please avoid squeezing or popping it. Gently wash the area with mild soap and warm water, pat it dry, and cover it with a clean, dry bandage. Please have a healthcare provider examine him soon so he can get the right targeted treatment and start feeling better.

Amoxicillin and potassium clavulanate is a strong antibiotic that can treat skin infections, but it should only be taken if prescribed by a doctor after an exam. Since the scratch was caused by wood and hasn't improved with Betadine, please have a healthcare provider look at it. They can check for infection, prescribe the right medication if needed, and make sure your tetanus vaccination is up to date. Keep the wound clean and covered, and see a doctor soon to help it heal safely.

Please be reassured that you have options before considering surgery. For a second opinion, I highly recommend consulting a dermatologist (skin specialist) first, as they are experts in localized skin conditions. A urologist (urinary specialist) is also an excellent option. Surgery to remove the foreskin is typically a last resort and often unnecessary once the precise cause is identified and treated. Getting a second opinion from one of these specialists is a very wise and safe step to find the right gentle treatment for you.

For Betadine (povidone-iodine), it is highly recommended to dilute it in a warm sitz bath rather than applying it directly. Applying it directly to the tear can severely irritate and burn the delicate, healing tissue. Adding a small amount to warm water is much gentler, though plain warm water sitz baths are often sufficient on their own. Try to keep the area clean, avoid straining, and consult your doctor if the pain persists.

While some mild redness can be a normal part of healing, persistent pain after a week suggests the wound might be irritated. I recommend stopping the boric powder immediately, as it is not safe for open wounds and can cause irritation. Additionally, long-term use of Betadine can sometimes delay skin regrowth. I suggest washing the scrape gently with mild soap and water, keeping it clean, and having a healthcare provider take a quick look to ensure there is no infection and help you heal comfortably.