Hello and welcome to HCM
It has been four days only since you got your wisdom teeth extracted.
After extraction of the tooth a space is created where the teeth once were present.
This space will initially be filled with blood and slowly the granulation tissue will grow into it.
Granulation tissue is fibrous tissue with newly erupted blood vessels.
Slowly entire area will be converted into a firm soft tissue as your gums.

So, there is nothing to worry. Do not be over concerned with that area. Leave it on its own to heal.
In the meanwhile you can take saline gargles and pain killers if it hurts.
In case there is excessive pain you can report it to your dentist to rule out infection.

Thanks and take care
Dr Shailja P wahal

After wisdom tooth extraction, take rest for a day. Don’t spit much after wisdom tooth extraction as it can lead to dislodgement of blood clot. Don’t drink anything with straw after 48 hours of tooth extraction and don’t smoke. Take the medicaments as prescribed by the oral surgeon and don’t chew from side of tooth extraction socket. After tooth extraction, you are advised to take soft foods such as mashed potatoes, smoothies and shakes and take more of fluids. You should not brush after 8 hours of tooth extraction and after that, you can brush your teeth gently avoiding area of surgery.After wisdom tooth extraction, socket may take 3 weeks to 3 months to heal completely depending on the procedure which is used for tooth extraction, angulation of wisdom tooth and amount of trauma to the investing tissues during tooth extraction