Anthony Anderson Has Bright Yellow Fluid Drained From Knee, on Video

Anthony Anderson hustled to the hospital to get a steady flow of fluid out of his knee … and, he uploaded it to social media to disturb all his fans’ dreams for years to come.

The actor posted an update about his medical anomaly Wednesday … revealing he had to rush on over to the ER Sunday night after his knee ballooned up way past its normal size.

Check out the clip … AA’s laid back in the hospital room while a doc puts a huge syringe directly into his leg — slowly pulling the plunger back.

Yellow fluid rushes into the tube, filling it all the way up. The doctor switches tubes and does it all again … two huge syringes filled with viscous material pulled from the star and disposed of.

Anderson says he was told he has arthritis in his knee … adding the doctors ultimately drained 140cc out of his extremity. He thanked the doctors at UCLA Santa Monica and his son, Nate.

The before and after pics are a sight to behold BTW … the knee is half the size after the fluid drain — if not even smaller than that.