Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Regular dermatology follow-up is needed while disease is active and while treatment is being reduced.
At routine visits, the clinician may ask about new blisters, itching, wound healing, sleep, medication effects, and the practical challenges of skin care.
Routine follow-up is appropriate when symptoms are stable, wounds are healing, and no concerning medication effects are present.
Earlier review is appropriate if itching suddenly worsens, new blisters appear regularly, dressings become difficult to manage, or treatment side effects interfere with daily life.
The article also says
Blood tests may be required for people taking oral corticosteroids or immune-modifying medicines.
The care team may also discuss blood pressure, blood sugar, bone health, eye care, vaccination, and ways to reduce infection risk.
The exact monitoring plan depends on the treatment and other medical conditions.
Bullous pemphigoid can relapse after improving.
A few new itchy spots or blisters may be an early sign.
Report a clear increase rather than changing treatment independently.
Photographs and a simple record of new blisters can help the clinician assess whether the disease is becoming more active.
Every sign above is quoted from the sofidex article on Bullous pemphigoid. If you are not sure, err upward — it is always reasonable to be checked.