Thankyou so much for your opinion and you time.May God Bless You.
This is not a skin issue and I recommend that you re-post it in the Pet General Health Issues section. That said, acute swelling of the neck and pale gums could indicate a severe allergic reaction, and I do not recommend using Malaseb shampoo again just in case. A herniated disc does not cause external swelling that you can see or feel, it causes pain/stiffness in the neck or back and wobbliness or paralysis in severe cases. The rapidly changing heart murmur may have been related to abrupt changes in blood pressure if it was an allergic reaction or shock, but there are alot of odd unrelated symptoms that you are describing, and I think an examination by the internal medicine specialists at UT is a good idea to get a different perspective.
Good luck,
Kimberly Coyner, DVM DACVD
The E.R vet was the one who told me his disc was ruptured.My vet said that there was narrowing of the disc.Thankyou so much for your time...