1 Sometimes, the larger molars cause more discomfort due to their larger surface area that can't slice through the gum tissue as an erupting incisor is capable of doing.  Most children have a complete set of 20 deciduous teeth (known as baby teeth or milk teeth) by 30 months of age.
Nociceptive, or somatic, pain is the common discomfort we have all experienced as a result of injury -- a paper cut, a broken bone, or appendicitis, among other things. Somatic pain makes sense to us; we can understand the patient's pain.
Types of Pain. Nociceptive Pain: Nociceptive pain is believed to be caused by the ongoing activation of pain receptors in either the surface or deep tissues of the body. There are two types: somatic pain and  visceral pain.Somatic pain is caused by injury to skin, muscles, bone, joint, and connective tissues.Deep somatic pain is usually described as dull or aching, and localized in one area.Somatic pain from injury to the skin or the tissues just below it often is sharper and may have a burning or pricking quality. Somatic pain often involves inflammation of injured tissue.eep somatic pain is usually described as dull or aching, and localized in one area. Somatic pain from injury to the skin or the tissues just below it often is sharper and may have a burning or pricking quality. Somatic pain often involves inflammation of injured tissue.