What is the reason that the toothache only occurs when lying down? | Toothache while lying down

What is the reason that the toothache only occurs when lying down? It is quite possible that the pain only occurs when the patient comes to rest and is not distracted by everyday events. It is also possible that the pain only occurs when the patient is lying down, when more blood reaches the head … What is the reason that the toothache only occurs when lying down? | Toothache while lying down