What is a suggested home treatment for siatica?

Several things: First, activities need to be modified to avoid exacerbations. Cardiovascular exercise can help control symptoms but you may need to see which ones are better tolerated. Time is the biggest factor in terms of recovery as most resolve. Lifestyle changes in terms of smoking cessation & weight control as well as having a regular exercise regimen will minimize recurrences. Use of otc meds help.

Core Exercises: Typically core strengthening exercises are the best to help relieve pressure and forces in the spine. I would try and google some or look them up on youtube to see descriptions. If you can do them yourself, wonderful otherwise ask your doctor to get a referral to a good physical therapist for further assistance.