On a scale of 1 to 10 the painfulness of a knee replacement is between a 5 to 8 out of a 10 and peaks up to around 9 out of 10 during the first couple of days after the knee replacement.
While the pain can be between a 9 out of 10 during the first few days, it starts to go down to around a 5 and 8 out of 10 as time goes on and you recover.
And the pain after a knee replacement is also well managed with modern pain protocols.
In days 1 to 3 after a knee replacement, which is the acute phase, the pain after the knee replacement often ranges from 5 to 9 out of 10, especially as the regional nerve blocks wear off and swelling peaks.
The pain in days 1 to 3 after a knee replacement, is often described as a deep ache, heavy pressure, throbbing, or tightness rather than a sharp knife like pain.
In weeks 1 to 2 after a knee replacement, the pain remains the most intense during this stretch, most particularly when bending, straightening or starting physical therapy, although baseline pain steadily drops.
And in weeks 3 to 6 after a knee replacement, the pain and discomfort decreases significantly, often lowering to a 1 to 4 out of 10 range, with soreness, mainly being triggered by movement or exercises.
And in 3 months and beyond after a knee replacement, most people report major relief with the pain dropping to less than 1 out of 10, although mild, intermittent aching or stiffness can still occasionally linger for up to a year.
Things that influence the pain after a knee replacement, include physical therapy, swelling and inflammation and multimodal management.
For multimodal management, surgeons use a combination of nerve blocks, anti-inflammatory medications, acetaminophen, ice therapy, and timed oral medications to keep the pain under control before it spikes.
And much of the early discomfort after a knee replacement, also comes from internal joint trauma and fluid buildup rather than the artificial knee replacement implant itself.
And moving the joint early after a knee replacement hurts, although doctors also emphasize that staying mobile and doing prescribed stretches prevents permanent stiffness and actually accelerates the reduction of pain.