Wazifas

Amal to treat navel displacement

Q: There's a certain amal for the treatment of navel displacement. The amal is as follows:

2 rakaats nafl salaah; 100 times Durood Shareef; 100 times Surah Fatiha; 100 times Durood Shareef.

After 2 rakaats, one should continue sitting on the musalla and recite the above. This amal should be carried out on an auspicious night. It is said to be effective if one yawns during the amal.

Also, this is to be able to treat others. So for example if someone's navel is displaced, then they would contact you. You will then recite Durood Shareef, Surah Fatiha, Durood Shareef a certain number of times. If you yawn during the reading then the persons navel has been displaced and you will read for them until they feel relief.

My concern is that generally we are discouraged from yawning. Can this amal be practiced?