How to treat thyroid cysts?

Written by Lin Xiang Dong
Endocrinology
Updated on September 25, 2024
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Thyroid cysts refer to fluid-filled sacs found in the thyroid, generally round in shape and varying in size, with no significant clinical symptoms. They can appear as a single nodule or multiple nodules. Typically, when thyroid cysts are detected, high-resolution thyroid ultrasonography can be used to observe their ultrasonographic appearance. Thyroid cysts are generally considered benign thyroid nodules and usually do not require treatment. Regular follow-up with thyroid ultrasound is sufficient. If the thyroid cyst is too large and causes compressive symptoms, such as difficulty in breathing or swallowing, hoarseness, etc., surgical removal can be considered.

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Written by Zhang Li
Endocrinology
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What causes thyroid cysts?

Thyroid cysts currently have no definitive cause identified. Previously, most believed they were possibly related to iodine deficiency, as such deficiency leads to thyroid hyperplasia and an increase in thyroid cysts. However, it was later discovered that in some high-iodine coastal areas, the incidence of thyroid cysts remains high. This suggests that variations in iodine levels, such as switches from low to high iodine or from high to low iodine, can also lead to the occurrence of thyroid cysts. Additionally, it is currently believed that there might be some connection with radiation and the use of mobile phones and computers, but there is no definitive conclusion. Regardless, once thyroid cysts occur, it is important on one hand to eliminate the possibility of malignant features, ruling out thyroid cancer, and on the other hand to ensure thorough thyroid function tests to understand if there are any abnormalities in function and whether treatment is needed.

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Precautions for Thyroid Cysts

If an ultrasound has confirmed a diagnosis of a thyroid cyst, it's important to manage iodine intake in your diet. You should not consume too much iodine, but also not completely avoid it; a normal, regular diet is sufficient. Secondly, it is important to monitor any changes in the size of the thyroid cyst. Regular ultrasound checks and self-examination can help observe if there's any rapid increase in size locally. If the cyst grows significantly and is accompanied by pain, it might indicate the risk of bleeding within the cyst. Normally, do not massage the thyroid cyst, as massaging will not have any beneficial effects.

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Written by Chen Xie
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What foods are good for thyroid cysts?

For patients with thyroid cysts, it is necessary to check their thyroid function to understand their condition. For patients with hyperthyroidism, it is advised to avoid iodine-rich foods, such as seaweed, kelp, and seafood. However, patients with thyroid cysts are suggested to eat more foods that can enhance the immune system, such as shiitake mushrooms, mushrooms, wood ear mushrooms, walnuts, Chinese yam, and red dates. They can also eat some foods that help reduce nodules and swelling, such as spinach, mustard greens, and kiwifruit. Patients with thyroid cysts are advised to quit smoking and drinking, and avoid spicy and stimulating foods, such as chili peppers, Sichuan peppercorns, and onions. Additionally, they should avoid eating overly greasy foods.

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What are the symptoms of thyroid cysts?

Thyroid cysts generally refer to a cystic mass found in the thyroid, typically containing a mixture of fluid or semi-solid fluid. The mass usually has clear boundaries and is painless. It can move up and down with swallowing, which distinguishes it from some subcutaneous nodules. Thyroid cysts generally do not show obvious symptoms or clinical signs and are mostly discovered when looking in the mirror or during a physical examination. However, larger thyroid cysts may cause compression symptoms, such as pressing backward against the trachea or esophagus, leading to symptoms like breathlessness and discomfort swallowing. A small portion may also exhibit signs of thyroid dysfunction, such as hyperthyroidism or hypothyroidism, although this is relatively rare in clinical settings.

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Symptoms of thyroid cysts

Regarding the symptoms of thyroid cysts, typically, patients with thyroid cysts do not experience any discomfort in the early stages. Often, a neck mass is incidentally discovered during a physical examination, and usually, there are no systemic clinical symptoms. Some patients may experience slight pain. Of course, if the cyst is large or there is bleeding within the cyst, it may lead to symptoms of compression, such as pain, difficulty swallowing, difficulty breathing, or hoarseness. Additionally, some thyroid cysts can affect thyroid function. For instance, if there is hyperthyroidism, symptoms may include heat intolerance, excessive sweating, and weight loss. Conversely, in long-term cases, patients may experience symptoms of hypothyroidism, such as cold intolerance, fatigue, constipation, and poor appetite.