Ashtangasamgraha 39.11

39.11

There, when it resembles a ripe jambu fruit, is slightly depressed, and the particular disorder has subsided, it is properly cauterised.
In the opposite case, accompanied by pricking pain, itching, stiffness, and the like, it is poorly cauterised.
In that case, he should apply [it] again.
With burning sensation, scalded feeling, redness, swelling, fever, suppuration, erysipelas, head disease, and aggravation of vāta and pitta, it is excessively cauterised.
Moreover:
In the eye, from excessive application, there is destruction of the organ of sight through perforation of the eyelid.
In the nose, there is destruction of the bridge of the nose and nasal cartilage, contraction, and loss of smell.
Likewise in the ear and other [sense organs], there is harm according to each.
In the anus, there is retention of feces and urine, diarrhea, impairment of virility, and death from perforation of the rectum, or constant swelling, pricking pain, agony, and discharge,
or inability to retain feces, urine, and flatus.
If it has acted excessively, he should promptly and repeatedly extinguish it with the very soothing agents mentioned before.
And for this reason, an excessively large area to be cauterised should not be cauterised all at once.
And on this point there is [a verse]:
Or with nicula, castor seeds, and wheat grits.