What can I do at home to reduce the pain of feet blisters?

From a lot of walking, I have a lot of blisters on my feet, especially the bottoms of my feet. It hurts worse than I thought it would, and I can hardly walk around. I read online that you can use petroleum jelly for temporary pain relief, but I don't have any of that. Are there any other ways I can relieve the pain with limited supplies?