Thank you for your query.
The problem that you have described has nothing to do with breast feeding. Does it occur when you are standing and the hands are hanging loose by the side? This can be due to pooling of blood. If you move your hands frequently then the blood circulation will control this pooling in the dependant part.
If the problem occurs during the laundry then you need to check on the detergents that you are using. Allergic reaction
to the detergent can cause slight swelling and even itching. If you can avoid doing laundry for a few days and the symptoms disappear then reaction to the detergent should be excluded.
Wishing you the best.