 [ Symptoms ] i have rocks and dirt in my knee it is starting to affect my life what can be done about it  around age 9 i fell and had a very bad injury to my left knee the wound was not cleaned properly and i have dirtrocks underneath my skin i am 29 now and occasionally i will feel a hollowness in my knee that makes it hard for me to walk  it feels like a disconnection between my thigh and leg i do not want surgery but i do not want this to get worse as i get older what are some treatments if i had to have surgery what would that entail and how long would recovery be [ Disease ] i do not know the age of your child or anything about his medical history but a small amount bright red blood is often an anal fissure a tiny tear in the anal ring but that is going to take an examination to determine there are other causes of course like polyps so seeing a medical provider is the best way to go