There are two things that are important to preventing sciatica and getting rid of sciatica pain. One is to keep your back in proper alignment, and the other is to wear low-heeled shoes. Although sciatica pain is felt in your leg - sometimes just the thigh and sometimes all the way down to your foot - the problem is in your back.
Note your posture when you're sitting. If you lean to one side, make a conscious effort to sit up straight. Leaning will put pressure on the sciatica nerve. If you lean over on the arm of the couch, switch to the other end of the couch occasionally, and then sit straight up the rest of the time. If you stick out one hip while standing, switch off and stick out the other one half the time, or just try to stand up straight.
Wearing no shoes or shoes with flat soles makes your back curve more than it should. Wearing high heels will put a strain on the back. But, a low heel will straighten the curve in your back enough to take the strain off the sciatica nerve.
Poor posture that contributes to sciatica pain can be caused by weak stomach muscles since they support the back. The abdominal muscles can be strengthened through exercises.
When standing to wash dishes, use a step stool to the side to prop up one foot. Switch the stool to the other side half-way through. Propping up one foot will take pressure off the sciatica nerve. While shopping, put one foot up on the back of the shopping cart whenever you stop.
If you sit a lot, get up and walk around occasionally. Stretching the back will also help.
Sciatica pain can be helped with anti-inflammatory such as Aleeve or Ibuprofen. If the pain continues for more than a few days, you may want to have a chiropractor adjust your spine.