Some stars face one another, such as Krittikaa and Shravan, and Bharanee and Maghaa. This means that there is mutual affliction or VEDHA between these two stars. The idea is that if the natal star is Krittikaa; and if the Sun is transiting Shravan star, conclude that there is trouble for the native.

In this connection, you have to remember some other technical terms also --
The natal star is called is "Janma Nakshatra".
The 2nd one from that is Sampatti or Sampadaa or wealth --------------  good Taaraa
The 3rd one from that is Vipatti or danger ------------------------------  No No
The 4th one from that is Kshem or happiness  ----------------------------  good Taaraa
The 5th one from that is Pratyak or obstruction -------------------------  No No
The 6th one from that is Saadhanaa or achievement (Saadhanaa Taaraa) - good Taaraa
The 7th one from that is Maran or death  -------------------------------  No No
The 8th one from that is Mitra or friendly  -----------------------------  good Taaraa
The 9th one from that is Param Mitra or very friendly  -----------------  good Taaraa
The 10th one from that is Karm or action
The 19th one from that is Aadhaan or depositing
The 23rd one from that is Vainaashik or destructive ----------------------  No No

So on a particular day or period, the Sun is transiting a star, which happens to be Vedha for one's natal star, then it indicates that there is danger to the life of the native.

But suppose the star occupied at that time by the Sun happens to be Vedha not for natal star, but for Aadhaan star (19th star from the natal star), then the effect would be fear and anxiety. For example, for the natal star of Mrigshiraa, Vedh star is U-Ashaadhaa. If the Sun is transiting U-Ashaadhaa, there is danger life for him; but if the Sun is transiting not U-Ashaadhaa but Vishaakhaa, which is the Vedh for the star that is the 19th star from the natal star Mrigshiraa, ie Dhanishthaa, it becomes the Aadhaan, there will be fear or anxiety. Similarly, if the star tenanted by the Sun happens to be Vedh star for Karm star (10th star from the natal star) - there will be loss of money.

In addition to the above, if the Sun is also conjoined with a malefic (Moon, Mercury, Venus, Saturn, Raahu and Ketu) death will be the result. In the same manner, see also if other Malefics other than the Sun, occupy in transiting stars, which are Vedh for the three stars (natal, 10th and 19th) - the result will also be death. If both malefic and benefic planets transit such stars, there is no danger for life.

Another Method
There is yet another way to find out the bad effects of transits :--
If Malefic planet transit the natal star, then the 3rd, 5th, 7th, 10th, 19th and 23rd stars will be dangerous for life. If these positions are occupied by Benefics in transit then there will be only failure of undertakings. Now you can see that this is another kind of Vedh - different from the Sapt Shalaakaa one. This is different from the Raashi procedure and its Vedh mentioned above as Sapt Shalaakaa method. The 10th and 19th stars counted from the natal star are called Anu-janmaa and Tri-janmaa respectively. This means that the 10th is the natal star in the 2nd round, and 19th in the 3rd round.

See also if the natal star in any round synchronizes with the Sun's entry into another sign of Zodiac (Sankraanti). If it does, then the effect is very bad. It may be death or danger for the life. The same effect will take place if the same natal star in any round happens to synchronize with the change of the sign of any other planet.