The causes of<unk>  are unknown. They are not associated with growth spurts, and some authors suggest alternative terms as providing a more accurate description, such as recurrent limb pain in childhood, paroxysmal nocturnal pains, or benign idiopathic paroxysmal nocturnal limb pains of childhood. Theories of causation include: * poor posture or other mechanical or anatomical defects, such as joint hypermobility; * vascular perfusion disorder, * lower pain threshold or a pain amplification syndrome, * tiredness, perhaps especially among children with weaker bones than average who have overexerted themselves; and * psychological factors, such as stress within the family. Some parents are able to associate episodes of pain with physical exercise or mood changes in the child.
Growing pains
Weather pains
Picardy sweat
Morphea
Neck spasm
Heat cramps
Toothache
Vomiting