Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Interstitial cystitis ?
    ### Response:
    Interstitial cystitis (IC) is a condition that causes discomfort or pain in the bladder and abdomen. Symptoms may vary, but often include an urgent or frequent need to urinate. Many of the individuals affected by IC are women. Because IC varies so much in symptoms and severity, most researchers believe it is not one, but several diseases.
    