Toothache implies physical pain in the teeth, often requiring medical attention or care. Kevin couldn't concentrate on his homework because of a throbbing toothache.
Pro Tip 2/3
Common Causes
Toothache often results from cavities, gum disease, or dental injury, not just eating sweets. She suspected her toothache was due to a cavity.
Pro Tip 3/3
Urgency
'Severe' or 'constant' toothache usually suggests a need for urgent dental care. Because his toothache was constant, James made an emergency dental appointment.