The "Sirasu Rajju" is another form of "Rajju Porutham". Those couples who has their Jenma Nakshatra (Birth star) defined in the list given below, is affected by the mismatched Rajju Porutham. This type of Rajju Porutham is called as "Sirasu Rajju". Nakshatras: Mirugasirisa, Chittirai and Avittam. Effects of Sirasu Rajju: 1. The Boy could be exposed to danger. The danger could be in the form of robbery, arson, accidents and physical or mental troubles. 2. The Boy could be harassed mentally or physically. 3. The honor of the Boy would come under severe pressure. 4. The Boy might face some critical moments in the life. These effects may happen, only when there is a possible planetary position on the natal chart (Rasi Kundali) of the Boy. Also it happens only, when there is a malefic Mahadasa that occurs during the lifetime of the Boy. Also it could happen during the convergence of malefic Dasa periods (Dasa Sandhi) of both the Boy and the Girl
Vedic Astrology Blog on Marriages