Can homeopathy help with chronic post nasal drip allergies and hypothyroidism ?

Yes: Can help. Thyroid may be better managed by replacement.

Daily saline: Daily saline irrigation may help but you need thyroid replacement for the hypothyroidism.

NO: There is very little data that homeopathy will help hypothyroidism. On the contrary, if one does not treat hypothyroidism there are very significant and potentially life threatening consequences.

Yes it can, BUT: Even though i'm a homeopath as well as a conventional physician, homeopathy would not be my primary recommendation for treating hypothyroidism. Replenishment of hormone is needed. Homeopathy can help whatever the body itself can heal -- and it can definitely help the allergies. You may also find some food sensitivities at the bottom of those, and dietary adjustments can make a huge difference!