Not recieving treatment or stopping treatment can lead to life threatening complications in a thyroid disorder, but there are a number of natural measures that you can take to improve your thyroid function and overall health and fertility, alongside your treatment.
There is a herbal remedy for under-active thyroid called Bladder Wrack (Fucus vesiculosus) which may lessen your symptoms. It can be taken as a tablet or a herbal tea. Nettles are also good, either as a tablet, tea or soup.
Nutrition and diet: this is very important. Certain foods worsen the symptoms of an under-active thyroid, such as caffeine, sugar, dairy products and processed foods. Cut these out altogether or at least reduce them to give yourself the best chance of health. Foods like cabbage, soya beans, spinach and nuts can sometimes interfere with hormone production so reduce these.
If you are suffering from over-active thyroid, increase your consumption of them instead.
Yoga has been shown to help in some cases. Please consult a qualified yoga practitioner to find out which exercises could help you.