What you need to know
Oxygenated water is good for stopping the bleeding and extremely useful in cleaning wounds.
Cotton wool may leave filaments inside the wound that could favour the risk of infection and delay healing.
Ointments and powders may cause allergic reactions.
Alcohol may cause burning in the areas surrounding the wound, and does not disinfect it by just being applied to the affected area.
Merchromine or other coloured disinfectants will tint the wound and make it impossible to observe its evolution. What not to do? If there are any foreign objects adhering to the skin or inserted into the body, do not try to remove them, and seek medical advice.