Clean with sterile water or hydrogen peroxide and water, then betadine ointment which you will be able to buy from any chemist
ETA:
Betadine ointment is an antiseptic for the topical treatment or prevention of infection in minor cuts and abrasions, minor surgical procedures and small areas of burns. For the treatment of skin conditions with pus caused by fungal or bacterial infections. For the treatment of infections in ulcers associated with bedsores or leg vein conditions.