Chalazion removed 3 weeks ago - small hard bump still there. Will it go away by itself? (Photo)

Hi! I had surgery to remove a champion on my upper right eye lid 3 weeks ago. It's a lot better now but I still have a small hard bump on the eyelid which is neither growing or subsiding. Should I go back to the doctor or is it just scar tissue that'll go with time? I use eye drops to keep the eye moist and wash the lid morning and evening with warm water.