there is no complete cure if keloid is BIG.
However few herbs can used as prescribed by ayurveda for reduction of keloid scar
Ayurvedic treatment of keloid is aimed at reducing the size of the keloid and treating symptoms like itching and pain. Medicines like Arogya-Vardhini, Maha-Manjishthadi-Qadha, Triphala-Guggulu, Chandra-Prabha-Vati and Kaishor-Guggulu are used to reduce the size of the keloid. Herbal medicines which can be used in this condition are: Haritaki (Terminalia chebula), Amalaki (Emblica officinalis), Behada (Terminalia bellerica), Marich (Piper nigrum), Manjishtha (Rubia cordifolia), Saariva (Hemidesmus indicus), Yashtimadhuk (Glycerrhiza glabra) and Mandukparni (Centella asiatica). Medicines which act on the \'Ras\' and \'Rakta\' dhatus (tissues) are useful in this condition. These medicines include Kutaj (Holarrhina antidysentrica), Kutki (Picrorrhiza kurroa), Patol (Tricosanthe dioica), Patha (Cissampelos pareira) and Musta (Cyperus rotundus).
In addition to oral medications, local application on the keloid is also a very important aspect of treatment. Herbal formulations which can be used for this purpose are: Panch-Tikta-Ghrut, Triphala-Ghrut, Kshar oil, Mahasaindhav oil and Chandan- Bala-Laxadi oil. An ointment containing Manjishtha, Saariva, Usheer (Vetiveria zizanioidis), Chandan (Santalum album), Triphala (Three fruits), Swarjika-Kshar and Tankan-Bhasma is used for local application on the keloids 2 or 3 times daily.
Medicines like Triphala-Guggulu, Kaishor-Guggulu, Mahamanjishthadi-Qadha, Yashtimadhuk, Mandukparni, Ras Parpati, Kutaj-Parpati and Panchamrut-Parpati need to be given for prolonged periods. These medicines need to be continued for at least 1 to 2 months after a complete resolution of the keloid, in order to prevent a recurrence of the condition.
however i would like to see ayurvedic experts on this forum to comment on this