I assumed i could eat

Question: I did cupping and thereafter had something to eat. What is the condition of my fast?

Answer: If it was in Ramadhaan, by assuming that your fast had broken, therefore you ate, you must keep a qadha and a kaffarah.

The same applies to applying surmah, doing a blood test or putting water into the ears, i.e If you thought that by doing these things your fast broke and therefore you ate something, a qadha and a kaffarah will be wajib.