bulge 5 weeks post op

Is this a cause for concern? I shook a friends hand and noticed this afterward
/Users/PJ/Desktop/IMG_3958.jpeg
Hello qwintar:

Welcome to HW Forum. If you have had out of control Osteoarthritis or prolonged Osteo, it is common for a person to get one or more nodules on their finger joints including the thumb joint. Sorry, you will need to copy and paste into your browser.

https://www.medicalnewstoday.com/articles/322363.php