Is rheumatoid arthritis actually hereditary?

Partly. Ra and other common diseases exhibit multifactorial determination--some genetic predisposition with modification by environemental factors.
To some degree. Yes, genetic factors play a role in autoimmune diseases such as rheumatoid arthritis (ra). The strongest modifiable environmental factor found to date is smoking. Smoking dramatically increases your chance of developing RA if you are predisposed.

Related Questions

How common is rheumatoid arthritis? Is it hereditary?

Rheumatoid arthritis. Rheumatoid arthritis is not common but not rare either. It has a hereditary component and having a family history increases your risk of developing the disease. Read more...
Rheumatoid arthritis. -prevalence: 0.3 - 1.5% of population -women affected 2-3x more often -twin concordance: 30 to 50% -peak incidence ages 30 to 50 years. Read more...

Is rheumatoid arthritis hereditary because my mother has it? I have stingness and numbness in fingers and toes. Is it sign of rheumatoid arthiritis?

Possibly. Autoimmune disease tends to have a hereditary component and RA is no exception. Do you have numbness and pain only with cold exposure? If so, this is called raynaud's and is often linked to autoimmune disorders but not specific to ra. Stop smoking. Read more...
Yes. No. Yes RA has a hereditary component. No your symptoms do not sound anything like ra. They probably represent something entirely different. Should see your primary care doc to have this evaluated. Read more...