he Sun, in conjunction with the Moon in the birth chart, can cause Amavasya Dosha. The Moon loses its strength under the influence of the Sun and remains weak in Amavasya. It loses its positive impact. Amavasya falls under the Tithi Dosha.

This will create struggles for a native having this dosha in his/her birth chart.

This dosha is called Kalathra Dosha in South India. In North India, it is known as Vivah Dosh.