For example if she is hyperthyroid to start with and not take the medication, she can expect to feel anxiety,
jittery, lose weight, have heart palpitations,
and insomnia. If she is hypothyroid, she may gain weight, feel sluggish, and tired alot, and feel depression. These are the most common effects of those diseases. It can take months or weeks for the symptoms to develop, depending on how bad she was to start with and her dosage. Be vigilant and keep an eye on her.