What is a submucosal fibroid?
A submucosal fibroid sits beneath the uterine lining and grows into the uterine cavity. Although it is the least common type, it is the one that disrupts menstrual bleeding most and is most strongly linked to fertility problems — which makes it clinically significant even at small sizes.
Why does it cause so many symptoms?
The uterine cavity is where menstrual bleeding and pregnancy happen. A growth protruding into that space — whatever its size — disturbs the surface of the lining: bleeding becomes longer and heavier, and embryo implantation can become harder. In the FIGO classification, types 0–2 describe how far the fibroid protrudes into the cavity.
Why is treatment assessed differently?
For cavity-facing fibroids, approaches working from inside the uterus (hysteroscopic) play a major role, with suitability depending on the FIGO subtype and size. For heat-based methods, proximity to the lining is one of the points requiring careful assessment — which option is realistic for you becomes clear only with imaging.