Your thyroid test being normal is a good sign, but chronic constipation and difficulty passing stool can have many causes beyond thyroid issues. Taking a liver tonic without a clear diagnosis is generally not recommended because:

• Liver tonics are designed to support liver function and do not directly relieve constipation.
• Chronic constipation requires proper evaluation to identify causes such as diet, hydration, medications, or other health conditions.

It is important to consult a gastroenterologist or a general physician who can assess your symptoms, possibly order tests, and recommend appropriate treatment. Meanwhile, increasing dietary fiber, drinking plenty of fluids, and regular physical activity may help ease constipation.

If you experience severe abdominal pain, blood in stool, or sudden worsening of symptoms, seek medical attention promptly. Avoid self-medicating with liver tonics or other supplements without medical advice, as they may not address your condition and could cause side effects.To narrow down potential causes, we will need some more information.I understand you're dealing with chronic constipation and difficulty passing stool, and your thyroid test came back normal. To better assist you, could you please provide your age and gender?