What dry socket actually is
After a tooth is removed, a blood clot forms naturally in the empty socket and protects the bone and nerve underneath while the healing process gets underway over the following days. Dry socket happens when that protective clot gets dislodged too soon, dissolves prematurely before healing has progressed, or never fully forms in the first place, leaving the site fully exposed — which is genuinely significantly more painful than the normal discomfort you'd expect after a routine extraction handled well. It tends to develop within the first few days rather than appearing weeks later, which is exactly why the early days of recovery matter so much more than the later ones.