"Rotten smell at entrance doorr near reception"

I am cardiac patient of some months. I came to visit Hematology 2nd floor on 30 Nov 2015 08:30 am, to have blood sample taken.

On arrival near entrance a waft of stomach churning smell hit me, which when got to , Hematology on second floor was completely clean and normal as were the lifts I used

However on my way out, on the ground floor past reception and exit door There was this smell again only much stronger stomach churning as though rotting meat I had to quickly rush out to get away away from it, I am not sure what cause of it was but it was very distinct, Clearly visitor use the same entrance soI do not rule out my own patient condition and for the benefit of doubt could I be advised and would be grateful and appreciate it if the matter could be investigated further.

Thank you.