Nux Vomica may aid in the relief of nervous digestion, ill effects from over- eating or drinking, travel sickness, constipation, itching piles, vertigo and premenstrual tension. It is indicated when there is a feeling that if only you could vomit you would feel better or when there is an urge to pass a stool - but the results are unsatisfying. Great for hangover headaches. This is the remedy to give after the birthday party, when the child has over-eaten and indulged in rich food. He will be very irritable, with possibly a sour taste and nausea, and may complain of tummy pains. This could be followed by a period of constipation, when this remedy will help.