What causes Bursitis?

I have it in my hip and have just been diagnosed with Bursitis in my shoulder.
I have osteo arthritis in my lower spine, knees and neck. I wonder if the two conditions are linked in any way.

Bursitis is the inflammation of bursa. Bursa are fluid-filled sacs that lies between tendon and skin. Bursa also lie between tendon and bone. There are hundreds are Bursa in the body.

The cause of your bursitis can be an infection ( gout or arthritis ), crystal deposits or trauma. The cure will differ with each cause.

If the cause is linked to gout/ arthritis -- it is helpful is to drink plenty of water to flush out the system and maintain a proper diet.

If the cause of your inflammatory bursitis is a trauma, then the cure may involve exercise, rest and avoiding repetitive motions.

If the cause of your bursitis is a trauma, one home remedy cure is to immobilize and apply ice, on and off again on your joint at 10-minute intervals. Another cure is to use castor oil on the afflicted joint to alleviate the bursitis pain no matter what the cause of it. Apply a heating pad if the cause of your bursitis is a chronic inflammation from overuse.

Log onto Wiki, it`s fully explained there.

I know Im shouldnt answer really, because I don't know but

I think you should go to the doctors and ask what it is as they are the most reliable source, because they also know if it afects you differently or anything

Oh my gosh! That is so funny! It was about an hour ago and I was sitting in my friends office. He is a doctor and I turned to a resident that is shadowing him today and asked him what causes it...sorta a quiz!!!! It is caused from repetative motion or a strain. It usally takes about 6 months to go away. Move your shoulder do not give to it. Work it everyday! Take 3 advil at a time 3 times a day. (if you are able to take advil). Good luck!

Shoulder bursitis :
Subacromial bursitis
The subacromial bursa lies just above the rotator cuff. Bursitis often develops due to injury, impingement (pinching), overuse of the shoulder, or calcium deposits. Symptoms include pain in the upper shoulder or upper third of the arm, and severe pain upon moving the shoulder.

Hip bursitis :
Trochanteric bursitis
The trochanteric bursa is located over the prominent bone on the side of the hip. Women and middle-aged to older people are more often affected by this type of bursitis. It may occur spontaneously without specific injury. Also, it can be caused by walking abnormally due to arthritis in the hip, knee, ankle, foot, or back. Symptoms include pain gradually occurring over the side of the hip (and sometimes traveling down the thigh); pain when sleeping on the side affected by bursitis, rising from a deep chair, sitting in a car, or climbing stairs; and occasionally, pain when walking.

Ischial bursitis
The ischial bursa is located below the bone in your buttock called the ischium. Inflammation may occur as a result of injury or prolonged sitting on hard surfaces. Symptoms include pain when sitting or lying down on the buttocks and pain that travels to the back of the thigh. Ischial bursitis is also called "weaver's bottom" or "tailor's seat."