A Kawah Ijen health license is a medical clearance/certificate required for visitors who want to hike to the Kawah Ijen crater in East Java, Indonesia.
What it is
An official health certificate stating that you are fit to hike and be exposed to sulfur gas.
It is required because Kawah Ijen has toxic sulfur dioxide (SO₂) gas, which can be dangerous—especially for people with certain health conditions.
Who needs it
All visitors (domestic and international tourists) are typically required to show it before entering the hiking area, especially when gas levels are monitored strictly.
What the certificate usually confirms
That you do not have:
Asthma or chronic respiratory diseases
Heart disease
High blood pressure (hypertension)
Pregnancy
Other conditions that could be worsened by sulfur gas or strenuous hiking
Where to get it
From a local clinic, health center (Puskesmas), hospital, or sometimes designated medical posts near Banyuwangi/Bondowoso
It is often issued the same day after a brief check (blood pressure, basic health questions)
Validity
Usually valid for 1–2 days only (very short-term)
Why it’s enforced
Sulfur gas levels can change suddenly
Authorities have closed the crater in the past due to fatal gas exposure
The license helps reduce serious health incidents
If you want, I can also tell you:
Where exactly to get it near Ijen
Current rules for tourists
What happens if gas levels rise
Whether guides or tours arrange it for you