Yes, you can feel ill after reflexology. It is possible to experience a variety of side effects after reflexology, ranging from mild to severe. The most common side effect is feeling dizzy or lightheaded. Other potential side effects include: headaches, nausea, vomiting, fainting, and fatigue. While these side effects are typically mild and resolve on their own, more serious reactions have been reported in rare cases. If you experience any severe side effects after reflexology, seek medical attention immediately.