Is It A Thyroid Problem, or a Lymphatic Problem? Sluggish thyroid function, or hypothyroidism, is the most common thyroid condition, affecting almost 50 million Americans. A sluggish or underactive thyroid can lead to tiredness, dry skin, weight gain, swelling, sensitivity to cold, muscle weakness, thinning hair, brain fog, and moodiness. In Ayurveda, these symptoms are all linked to a kapha imbalance. Specifically, the lymphatic system becomes congested, causing a feeling of body-wide sluggishness. When the cervical lymph nodes (rasa dhatu) in the neck that drain the thyroid become congested, kapha (congestion) can build up in the thyroid, resulting in sluggish function. While Western