Smoking by the mother during pregnancy increases the risk that the child will suffer from headaches. Brazilian researchers published results of their study in the journal Cephalalgia. They collected information on over 1,600 children aged 10 – 11 years and discovered that children of mothers who smoked 10 or more cigarettes a day were more likely to suffer from tension or migraine headaches. Surprisingly, exposure to second-hand smoke was not associated with an increased risk of headaches in children.