Rainbow Clinic is a Reliable and one of the Best Diabetes and Thyroid Clinic in Ravet, Nigdi, Punawale, Chinchwad and entire PCMC. Diabetes and thyroid disease are both endocrine, or hormone, problems. When thyroid disease occurs in someone with diabetes, it can make blood glucose control more difficult. The thyroid is a butterfly-shaped gland in your lower neck just beneath your skin.