US Constitution the words slave or slavery do not appear in the constitution yet they are certainly referred to it.   1. The 3/5 clause which says that an enslaved person will only count as 3/5 of a person in the census. 2. ban on middle passage slave trade.
Inner side of knee. The most common cause of medial knee pain or pain on the inside part of the knee is a medial meniscal tear. The tear can be acute or degenerative but either way can cause pain and limitation of activities. Occasionally a torn meniscus can flip in and out of the joint and cause pain as well as locking of the knee.
Arthritis of the knee may cause periodic inflammation. This can be due to the formation of bone spurs (osteophytes) or extra fluids in the knee. Swelling may be more pronounced after a long period of inactivity, like when you first wake up in the morning. The skin on your knee may look red or feel warm to the touch.