“…In other reports, cephaleas were found to mainly appear or increase during night (Coulaud et al, 1970;Saimot et al, 1971) as to give rise to nocturnal vomiting (Berenger, 1984). In several cases, cephaleas were noted be persistent (Cames et al, 1947;Desage, 1926;Málaga et al, 2012;Nuñez Fernández et al, 2001;Wang et al, 2007;Ying et al, 2007), intermittent and appearing in episodes or recurrent (Schussele and Laperrouza, 1971a,b;Stemmermann, 1953), intense (Arjona et al, 1995;Brouet et al, 1951;Cames et al, 1947;Dejean, 1960;Dunet, 1924;Guyot, 1962;Mendoza, 1922), or violent (Berenger, 1984;Desage, 1926). When of long duration, severe cephaleas may be of only 1 week (Birjawi et al, 2002), 3 weeks (Brouet et al, 1951), 1 month (Dunet, 1924), 2 months (Ahualli and Arias, 1961), 5 months (Domart et al, 1967), 1 year (Ragab and Farag, 1978), or even 15 years (Cames et al, 1947).…”