The West Brom skipper suffered a fractured ankle when falling awkwardly during the home New Year's Day clash with Everton.
He will be out of action for eight to 10 weeks after undergoing surgery and admits he is struggling to come to terms with such a lengthy lay-off.
The 27-year-old told Albion's official website: "I've been lucky in my career in not having many injury issues in the past. This is probably the first real one for me.
"In any case, any other time I've had to have surgery has been in the close season so I didn't miss any games.
"It hasn't been too bad so far but, as time goes on, I'll get more frustrated with not being able to get out on the field.
"It's never nice to miss games at any time but this is the crucial part of the season.
"Having a timeframe probably helps; knowing that it is eight weeks minimum gives me something to get my head around. At least I know I'll be back this season if all goes to plan."
Brunt is relieved the injury setback proved not to be even more serious.
He said: "The medical staff were happier it was a fracture rather than ligament damage or a tear. Initially they thought it was to do with my tendon which would have been a lot more serious.
"The operation went well but I've got a long few weeks ahead of me to get fit again and can't do much rehab yet as I still can't put any weight on the ankle."
