What should I do if the soap causes redness, itching, or stinging?

Even mild, fragrance-free soaps can trigger reactions in highly reactive or compromised skin. If you notice redness, itching, stinging, or a rash during or after use, stop using the product immediately. Rinse the area thoroughly with lukewarm (not hot) water to remove any residue, then pat dry with a soft towel — do not rub. Apply a fragrance-free, minimal-ingredient moisturiser or barrier cream (e.g., one based on petrolatum, ceramides, or colloidal oatmeal) while the skin is still slightly damp.

If the irritation resolves within a few hours to a day, it was likely a transient barrier disruption. If it persists, spreads, or worsens (weeping, swelling, heat), seek advice from a pharmacist, GP, or dermatologist. They can determine whether it's an irritant contact dermatitis, an allergic reaction to a specific ingredient (tea tree oil, while natural, is a known sensitiser for some people), or an underlying skin condition unmasked by cleansing. Do not self-treat with topical steroids without professional guidance. Keep the packaging or ingredient list to show the clinician.