The use of diluted bleach to treat beriberi (fungal infection) requires caution, because bleach is highly irritating and improper use may cause skin damage. The following are **Safe ratios and steps**, but it is recommended to give priority to antifungal drugs recommended by doctors (such as clotrimazole, terbinafine, etc.), and bleach is only used as an auxiliary measure.： --- ###**Dilution ratio and steps** 1. **Ratio recommendation**： -**1:50 dilution**: Add **1 teaspoon (about5ml) of household bleach (5% sodium hypochlorite)** to **1 heated water** (about40°C) and mix well. -Or **1 cup (240ml) bleach + 1 gallon (3.8 liters) of water** (suitable for soaking in a foot bath). 2. **How to use**： -Soak the affected area in the diluent for **5-10 minutes**, **1 time** per day for no more than **1 week**. -Rinse thoroughly with water after soaking, and dry your feet (fungi like dampness). 3. **Precautions**： -**Skin test**: Before the first use, test on the wrist or healthy skin to see if it is allergic or irritated. -**Avoid contact with mucous membranes**: Do not use it on the eyes, mouth or damaged skin. -**Concentration control**: Do not use the raw liquid directly, high concentrations can cause chemical burns. -**Deactivation signal**: If there is redness, swelling, pain or peeling, stop immediately and seek medical attention. --- ###**Safer alternative** 1. **Antifungal drugs**: Over-the-counter drugs (such as biphenylbenzazole cream) or oral drugs (prescription required). 2. **Natural auxiliary method**： -Soak your feet in white vinegar (1:2 vinegar-water ratio, 15 minutes/day). -Tea tree essential oil (apply topically after dilution, allergy test is required). 3. **Keep your feet dry**: Wear breathable shoes and socks, change frequently, and avoid sharing towels/slippers. --- ###**When will I seek medical attention? ** If the symptoms (itching, peeling, ulceration) last for more than 1-2 weeks, or the infection spreads, please consult your doctor in time. People with diabetes or immunocompromised people need to be extra cautious and avoid self-treatment. **Safety first**, bleaching agents are not the preferred therapy, and reasonable medication is more effective and safe.