How can I realign my spine by myself?

Find a strong friend; lie on stomach on flat surface and grip edge of bed or table with hands, arms extended. Have friend gently grab your ankles and stretch or pull you (again, gentle is the word.)

find four horses and some shackles/chains, go out to a big open field, face them in four different directions…

For the cognoscenti: that is commonly known as “drawn and quartering.” It will certainly realign what is left of your spine.

Practice yoga daily.

Here are great poses for your spine

Simply lying flat on a hard surface for long periods can lead to a realignment of the spine. Simple and painless. But, ofcourse, it may not work, depends how badly it is now misaligned.

Doing this on your own would be at your own risk. You could either pay hundreds for a chiropractor or thousands for surgery.

2nd for yoga.

I have scoliosis and a tricky lower back; many of the traditional yoga stretches would leave me crippled.

I third yoga.

@gailcalled: Your situation is exceptional, and the OP does not mention any history of spinal problems or injury.

Yoga is modifiable to the individual. Not all people have the same strength, flexibility, or proportions… so the poses can be altered to your abilities. A good yogi will teach the modifications leading into the full expressions of the poses, and especially guide you if you’ve informed them of your specific challenges.

Unfortunately, not everybody has a good understanding of their own body mechanics; and many don’t realize that yoga isn’t just about relaxing and streching… you have to know which muscles to engage to properly support the stretch.

I am sure that there are some people (perhaps even you) for whom no form of yoga should be attempted, but for the vast majority, yoga is beneficial for the whole body, and spine is far less likely to go out of alignment in the first place, and if it does, you’ll know which moves will bring it back.

Lie on your back, with your arms extended to the sides.
Raise up one leg, bent at the knee, and cross over your body with it, and touch the knee on the ground on the other side of you. You can use one arm to help, but keep your shoulders flat on the ground. Then, repeat this with the other knee.

Whatever you do, avoid chiropractors at all costs. Those charlatans have no business touching another human being, unless it is to give them a free hug. The best one I ever heard was a chiropractor suggesting dietary changes for a patient. That’s like going to a voodoo priest to cure indigestion.

If you can reach the top of a door frame, preferably a strong one – hang off it. I’m being serious, it seems to work for me, though I can’t manage more than thirty seconds. Trees work too.