This sounds like a swollen lymph node, but if you are concerned or it lasts a long time you should seek the advice of your physician.
It can be an infection, a harmless scar or cancer.
Myofascial nodule is a raised area on the neck or head that causes pain. These nodules are trigger points for pain in other parts of the body.
There are several causes of hyperthyroidism. Most often, the entire gland is overproducing thyroid hormone. Less commonly, a single nodule is responsible for the excess hormone secretion, called a "hot" nodule
After performing a thyroid scan uptake, if it is determined that there is a hot nodule it typically means that the nodule is hyperfuncitioning. According to the American Association of Clinical Endocrinologists ThyroidAwareness.com website, "The scan tells whether the nodule is hyperfunctioning (a "hot" nodule), or taking up more radioactivity than normal thyroid tissue does; taking up the same amount as normal tissue (a "warm" nodule); or taking up less (a "cold" nodule). Because cancer is rarely found in hot nodules, a scan showing a hot nodule eliminates the need for fine needle biopsy. If a hot nodule causes hyperthyroidism, it can be treated with radioiodine or surgery."
they have got a root nodule
A heterogenous thyroid nodule can't be "fixed", but it can be treated or removed if it is causing a problem. Not all nodules need treatment. There are multiple types and causes of nodules. The treatment (if needed) is based entirely upon the reason for the nodule however, and seeing an endocrinologist who specializes in thyroid care is important to an appropriate diagnosis and treatment of the condition.
Only a doctor can order the tests to determine if any thyroid nodule is dangerous. A thyroid uptake scan will help your doctor determine if your thyroid is hot (active) or cold (inactive).
A singer's nodule, also known as a screamer's nodule or a teacher's nodule, is a small, inflammatory or fibrous growth on the vocal cords. It typically occurs in people who constantly strain their voices.
Myofascial nodule is a raised area on the neck or head that causes pain. These nodules are trigger points for pain in other parts of the body.
A benign fatty yellowish nodule is called a tumor.
Hypodensity in the brain means that in an area there is less density than other areas of the brain. Instead of brain tissue, there is fat. There are different causes, and a doctor needs to determine it through additional testing.
There's blood supply inside of it not just leading to it