There was a wooden cut and I cleaned with dettol and used undiluted Dettol on cotton and plastered the cotton on the wound for 10 hours. Now I see there a black patch around the wound. Does the dark patch fade itself off ? Should I be worried for any side effects for it?
The black patch around the wound is likely due to skin irritation or a mild chemical burn from undiluted Dettol. It should fade over time, but keep the area clean and avoid further irritation. If the patch worsens or shows signs of infection (redness, swelling, or pus), consult a doctor.