Expert: There are two causes of sciatica. The good news is that James has a deep muscle spasm.

October 10th Today, the Lakers officially announced that forward James will undergo re-examination in about 3 to 4 weeks due to right sciatica.

CBS Sports immediately invited former Knicks team doctor and sports medicine expert Marty Jaramillo to analyze James' injury.

"Sciatica is inflammation of the sciatic nerve. The sciatic nerve is the largest nerve in the body. It is composed of five nerves extending from the five lumbar vertebrae in the lower waist and extends down to the back of the leg. There are two causes. One is structural damage, which may be related to the lumbar disc, and Bone spurs caused by osteoarthritis may be related to muscle-level causes, which may be related to deep hip muscle spasms

"The good news at this time is that based on early reports, his problem is deep muscle spasms in the right hip, and the specific muscle affected is the piriformis muscle. The piriformis muscle is located deep in the buttocks and can compress the sciatic nerve. The two most common areas of pain are in the hips and calves, caused by excessive load or impact, or improper landing. However, sometimes a long flight or drive can cause this pain. So the good news is that he'll probably only miss 3 to 4 weeks, which is great news in the short term.

"In the short term he needs a lot of rest, a variety of different physical therapies, and most importantly, deep hand massage on that tissue, and then they will slowly start some strengthening techniques to help relieve the pressure on the waist and hips, and some exercises to improve his shock absorption.

"Long term, he is 40 years old, about to be 41. Let's treat the 41-year-old LeBron as if he is 10 years younger, but the older you get in the NBA, the more likely you are to suffer back and soft tissue injuries, and you will definitely need a longer recovery period. So, he needs a full range of flexibility training, strength training and load management. "The expert said.

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