The Stay With Me hitmaker underwent an operation to treat a vocal cord haemorrhage earlier this year (15), and when he discovered Glynne had the same issue, he stepped in and recommended his surgeon.
The Rather Be singer tells Britain's Daily Mirror newspaper, "Sam Smith has been amazing and supportive, giving me some great advice. He actually put me in contact with the same doctor that he and Adele saw.
"We were talking quite a lot throughout and my manager spoke to Adele's management about the situation and he helped out. I really wanted to speak to her about it, but I never got the chance... (My throat problem) was bad timing. I was so, so upset. I had to cancel so many shows and just disappear. It was really hard to deal with. Three weeks of no talking was awful. It felt like forever. I had to carry a white-board to write everything down it was horrible. It makes you feel quite depressed."