1. Common symptoms and characteristics of thromboangiitis obliterans:
(1) Obstructive type: Also known as cold凝聚 blood stasis syndrome, the affected limb prefers warmth and fears cold, feels cold to the touch, worsens in pain when exposed to cold, and eases in pain when exposed to heat. The skin color may be pale or purplish due to stasis. The tongue coating is thin and white, and the tongue body is light red. The pulse is deep and fine or wiry, and there is no thirst. This type is often seen in the early stage or during the recovery period.
(2) Damp-heat type: Also known as damp-heat accumulation (can be classified as biased towards dampness or heat), with qi stagnation and blood stasis syndrome. Manifested as mild coldness in the limbs, recurrent migratory nodules or cords with redness, swelling, burning sensation, and pain. The affected limb feels sore, heavy, weak, or has moist redness or purplish-red swelling. Mild gangrene may occur. The edges of ulcers show erosive eczema and excessive exudate. The tongue coating is greasy and yellow, and the tongue body is red. The pulse is slippery or wiry and rapid. This type is commonly seen.