Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Pityriasis lichenoides chronica ?
    ### Response:
    How is pityriasis lichenoides chronica diagnosed? The clinical appearance of pityriasis lichenoides chronica suggests the diagnosis. However, since it can look like psoriasis, lichen planus, or the common bug bite, a skin biopsy is recommended to confirm the diagnosis.
    