Identify and treat the underlying cause with a healthcare professional
Stop smoking
Stay well hydrated
Avoid iron supplements unless prescribed
Avoid vitamin C supplements with iron-rich meals unless advised
Limit iron-rich foods if your clinician recommends it
Avoid high-dose vitamin B12 or folate supplements unless prescribed
Donate blood if you are eligible and your clinician approves
Treat sleep apnea if present
Manage chronic lung or heart conditions
Review medications that may raise hemoglobin with a clinician
Reduce altitude exposure if possible
Seek urgent medical care for very high hemoglobin or symptoms such as chest pain, shortness of breath, severe headache, or vision changes