Knuckle cracking when performed repeatedly could irritate the joint cartilage....
If you do desk based computer keyboard work the muscles around the wrist which start at the elbow could be tight.
Yes as indicated earlier if you have 2 sides affected and other joints involved do a blood test. Sometimes all the indoor sitting could also give joint based pain as Vit D levels drop.
Next Steps
Palm up and move the wrist up and down with 10-15 sec holds. rotate from palm up to palm down 10-15 times, gripping and some shoulder pull back with hold 10-15 times, could help.
Health Tips
hope this helps, use online consult if needed for specific tailormade exefcises for you