I've Had My Thyroid Taken Out Due To Very Large

I've had my thyroid taken out due to very large goiters which interfered with swallowing. The first side was taken in 2006 and the second side was taken 2009. I take snythroid and cytomel. I've noticed lately that have several indentations in the top of my skull. I'm wondering if this might be a thyroid condition or something that might be concerning. Ideas?