Is it permissible to break the fast in Ramadan due to severe thinness that causes dizziness and psychological fatigue, with the intention of making up for the missed days after Ramadan?

If fasting causes an unbearable hardship, or if there is fear of harm resulting from it, then breaking the fast is permissible, and making up the missed days is obligatory whenever possible. Fear of disfigurement (such as extreme emaciation) due to fasting is considered an excuse that permits breaking the fast.