To describe the natural history of a condition or disease. To describe the natural history of a condition or disease. To determine effectiveness or cost effectiveness of treatments/services and/or health care products. To measure or monitor safety and harm. To measure quality of care.
According to the NMSS, attacks or flare-ups of symptoms only qualify as exacerbations if: 1  they occur at least 30 days from an earlier flare-up. 2  symptoms last for 24 hours or longer.
The blisters eventually collapse and form an ulcer. This will take two to three days. It often takes seven to 10 days before these ulcers completely disappear and the skin returns to normal. In primary herpes, the healing process usually takes two to three weeks, but skin pain can last for one to six weeks. This answer should not be considered medical advice...