Especially since this summer has been so hot and moist, I would say it might just be the heat. Red bumps from the knees down could be irritation after shaving your legs due to the moisture in the air or due to sweat, and fingers are notorious for swelling in the heat. Either way, you could always try stopping the vitamins altogether to see whether the symptoms go away.
You could be right, that you are allergic to something new that you are taking. Stop it and see if the swelling would go away again like it did with your other episode. You are a good observer. If the swelling does not subside, then you need to get it checked.
Take care.
You might need to see a rheumatologist to determine if you have Lupus. It does affect the fingers....
Hello,
There are a number of causes of swelling in the fingers. The common causes are trauma, idiopathic edema, liver or kidney disease, allergic reaction etc.The other underlying causes could be thyroid malfunction, heart ailments, blood disorders, arthritis, or infections. It is important to seek medical intervention and rule out the common possibilities. I sincerely hope it helps.
Best luck and regards!