Sweet Chirata / Chiraita Shireen / Tharirah (چراعیتہ شیریں, ذَرِيرة) is scientifically known as Swertia Chiratta.

Ibn As-Sunni reported in his book that one of the wives of Prophet Muhammad Sallallaho Alaihe Wasallam said "Once the Messenger of Allah came by when I had a pimple on my finger, he saw it & asked:

 "عِنْدَكِ ذَرِيرةٌ" ؟ قلت: نعم. قال: "ضَعيها عليها"، وقُولى: "اللَّهُمَّ مُصَغِّرَ الكَبِيرِ، ومُكبِّرَ الصَغِيرِ، صَغِّرْ مَا بِى"

"Do you have a Tharirah (arum or sweet chirata), I said, Yes". He said, "Place it on the pimple. He then said, Say, O Allah who Transforms the big to small and the small to big, make what I am suffering from small".

Sweet Chirata is an herb, which is found almost everywhere. In damp forests, places which receives high moisture and humidity. It is found in two varieties, one which bear white flowers and another which bears blue flowers.

Sweet Chirata is used for fever, constipation, upset stomach, loss of appetite, intestinal worms, skin diseases, and cancer.