4-115 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Ali ibn Ibrahim ibn Hashim quoted his father, on the authority of Isma’il ibn Marar, on the authority of Yunus ibn Abdul-Rahman that Abil Hassan Al-Ridha (MGB) said, “Blood pressure has four signs: itching, pimples; drowsiness, and dizziness.”