Foot Problems Again

The "My foot hurts, Mama," began at about 7:00 p.m., and I knew we were in trouble.  I gave E some Tylenol to try to nip it in the bud, and that seemed to work while it worked, anyway.  She slept straight from 9:00 until 3:00 a.m.  But then...  Then, she woke up four times between 3:00 and 5:00, and was up for the day by 6:00.  Why her foot hurts, I don't know.  I rubbed it.  She asked for lotion, so I put lotion on.  It was always the same one.  And it's only been three weeks since the last foot-keeping-us-awake-all-night incident, so a growth spurt doesn't seem likely.  So... is she just messing with me?