These cases last for months and are far more tantalizing than the former type of ulceration for the reason that from time to time they show a strong tendency to heal, the process clearing up almost entirely, when suddenly the former area of the ulceration is equalled or exceeded.
Treatment
Many of these ulcerations yield readily to salvarsan and in such cases we naturally think of a syphilitic or framboesial etiology.
Castellani has recommended a protargol ointment, 5 to 10%, which is applied to the ulcer after previous flushing with hydrogen peroxide or other antiseptic lotion.
At times thorough cauterization with pure carbolic acid followed by neutralization with alcohol may shorten the process.
Iodide of potash benefits some cases but has no effect on others and the same is true of mercurial treatment.
An 8% ointment of scarlet red should be tried on these sores when treatment with ordinary applications fails.