If I hang my arms down like with walking, my hands swell and tingle. I have had costochronditis also before. It’s not fun. I used Vicks vapor rub and a heating pad. I got mine painting ceilings and 9 foot walls. If you have a good case, it hurts to raise your arms and to breathe. After resting it after a couple of weeks I tried painting wall again. Blew my elbow out and had to have a tendon repair. The Lord didn’t want me to paint. I love to paint because it’s instant gratification.
I use ice and run cold water over my hands. I use my compression gloves. I know that it’s aggravating to wear the gloves. I also elevate my hands with pillows when I sit in my recliner.
Remember to raise your hand above your heart . The tingle is from nerve irritation and the swelling. It’s just RA messing with you! Actually when I could take anti- inflammatory meds it made my swelling worse.
Good luck.

I have some peppermint essential oil that I put behind my ears and one down my sternum and tell myself it’s not my heart. Then breathe the peppermint in until pain subsides. Usually a few minutes to an hour before it stops.

So scary having similar symptoms as a heart attack and actually thinking you’re having a heart attack it never ends.

I get sternal spasms when I’m in a flare so I know exactly what you mean about heart attack.

Mine does when the swelling is too much.