A tooth problem is a common issue that can be caused by a variety of factors. The four crossword solutions for the term 'tooth problem' are ACHE (4 letters), PLAQUE (6 letters), DECAY (5 letters), and CARIES (6 letters), and ABSCESS (7 letters). ACHE is a general term for pain, which can be caused by PLAQUE, DECAY, CARIES, or an ABSCESS. PLAQUE is a sticky film of bacteria that builds up on teeth and can cause DECAY. DECAY is the destruction of tooth enamel caused by acids produced by bacteria in PLAQUE. CARIES is another name for cavities, which are holes in the teeth caused by DECAY. An ABSCESS is an infection in the gums or root of the tooth that can cause severe pain.