The wife of hospitalised country icon T.G. Sheppard has shared her concerns about the sick star, revealing the singer's bladder infection is "very hard to treat".

The 68-year-old singer, real name Billy Neal Browder, was admitted to a Nashville, Tennessee hospital over the weekend (13-14Oct12) and the infection prompted his heart rate to soar.

His wife Kelly Lang revealed on her page that Sheppard is "very weak", and she has since returned to the site to update fans on her husband's condition.

In a post, she writes, "I hesitate to share this now, but I do want you to know how serious T.G's condition has been. The bladder infection had spread into his bloodstream and is very hard to treat. That being said, it is the reason for his still being in the Critical Care Unit. I feel that he is getting better, but certainly not great."