If you or someone you know is bitten by a dog, more than likely it will be a minor bite that can be treated at home by following these steps:
Clean the wound immediately: run it under warm water for a few minutes to ensure it is thoroughly cleaned.
Encourage bleeding from the wound: if it is not already bleeding, gently squeeze the wound to encourage it to bleed, which will help prevent bacteria entering the wound.
Provide pain relief: take over-the-counter painkillers, such as paracetamol or ibuprofen to reduce pain and inflammation.
Because there is a risk of infection the NHS also recommends seeking medical advice for a dog bite, unless it's a very minor one.
If that dog have rabies or hydrophobia you must see the doctor for prevent a rabies