"Happy 4th everyone!!!" he Tweeted on Sunday. "Feeling better today."
Later in the evening, he added, "I'm healing, slowly. I'll be doing rehab for a while. I messed a few things up when I crashed."
Earlier in the week, his wife, Tori Spelling told PEOPLE, "He's taking this as a sign and realizing family is too important to risk his life."
McDermott, 43, certainly seems focused on family, Tweeting about his 3-year-old son Liam with Spelling.
"Tori asked Liam who his best friend was and he said, "Dean is. He is my brother," McDermott wrote. "Made me cry."
His wife retweeted the message and added, "Happy 4th of July everyone! Have a great and safe holiday!"
On Saturday, McDermott shared details of his recovery.
"I had the worst night," he wrote. "Catheter cut me up coming out. Unbelievable pain. I got a fever of 104 and was throwing up. Fun, WOW!!!"
We're glad you're feeling better, Dean, but that might just be T.M.I.!