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1.
S₁: The exact cause of migraine is still not known.
S₆: On the other handphysical overexertion, fatigue, irregularities in dietary habits, prolonged eye strain are common precipitating factors.

P: Several factors like digestive disorders and psychological disturbances, have been said to be causative factors.
Q: Certain foods like cheese, chocolate or red wine have also been found to trigger off an attack.
R: The causative factors are numerous : psychologically, anxiety and frustration play an important part.
S: It seems to be hereditary and a majority of sufferers are women.