Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Problems with Smell ?
    ### Response:
    People who experience smell disorders either have a decrease in their ability to smell or changes in the way they perceive odors. Total smell loss is relatively rare, but a decrease in the sense of smell occurs more often, especially in older adults. There are several types of smell disorders depending on how the sense of smell is affected.
    