Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Porphyria ?
    ### Response:
    Some people with porphyria-causing gene mutations have latent porphyria, meaning they have no symptoms of the disorder. Symptoms of cutaneous porphyrias include
                
- oversensitivity to sunlight  - blisters on exposed areas of the skin  - itching and swelling on exposed areas of the skin

    