Treating a natural disease can be done in multiple ways. Ideally, the infected individual has access to a healer and an herbalist. Healers can diagnose and treat the disease. Herbalists can create remedies useful for reducing the symptoms.
When using the herbalism proficiency, the herbalist may provide poultices and other herbal remedies to treat symptoms, but the symptoms must be told to them, or be obvious. In order to mix the proper treatment for the symptoms, the herbalist must have the herbs on hand, or it requires 1d4 days to gather them, if they are locally available. To make the herbal remedy requires another 1d4 days. The herbalist will be able to create enough of the remedy to keep the diseases symptoms at bay for one day per point of success. For example: If an herbalist wants to mix a remedy and has an herbalism proficiency rating of thirteen and the herbalist rolls a nine, the remedy will prevent the symptom for four days.