足指冻疮，因受禀虚怯，故寒邪易乘，气血凝滞，久而不愈则溃烂成疮。治法须壮脾胃温气血，则死肉自溃，良肉
自生。若骨脱筋连者，宜急剪去，否则毒延脚面而死。盖肢末之处，气血难到，又为外邪遏绝，则气血不能营运。若用
汤荡、火烘，其肉即死而不仁，至春必溃腐脱落。元气无亏，虽患无害，如外敷寒药，内服消毒之剂，则元气受伤，
必成败症。凡初冻时，热手频熨之为妙。北方冻耳，若误以手触之，其耳即落。大寒能裂肤堕指然，信矣。
一女子数岁，值严寒北上，因失所恃，而足受冷，侍婢用热汤泡之，至春月房中秽气，其父觉之，脱袜方见十指俱
烂，但未堕耳，余用托里之剂助其阳气，溃脱以保其生。
一小儿仲冬严寒，两耳受冻，不知痛痒。令人以热手徐徐频熨，内用温补脾气之剂，及敷白蔹散而愈。
一小儿七岁，冬间足指冻痛用烧汤浸洗，至春溃脱，疮
口不敛，足跌肿痛，余谓此元气虚弱，须补胃气以生肌肉。不信，乃用寒凉消毒之剂，肿消黑色，自以为愈。余曰∶此
脾胃虚极，元气不能运及患处也。后两腿羸细而殁。
一少儿扑伤足跌少许，遂成冻疮，作痛不止，用火烘之肉死，至春足脱，脓水淋漓，不能收敛而殁。此症若能调养
脾胃，使元气不伤，则肌肉自生，岂至于死哉！
白蔹散
白蔹（一两） 黄柏（炒黑，五钱）
上为末，干搽患处。
足部脚趾冻疮，是因为先天禀赋虚弱怯懦，所以寒邪容易侵袭，导致气血凝滞，时间久了不愈合就会溃烂形成疮疡。治疗方法必须通过补益脾胃、温养气血，那么坏死的肌肉自然会脱落，健康的肌肉自然生长。如果骨头暴露、筋腱相连的情况，应当立即剪除坏死部分，否则毒素蔓延至脚面会导致死亡。因为四肢末端的地方，气血难以到达，又被外邪遏制隔绝，导致气血不能运行流通。如果使用热水烫洗、火烤，那里的肉就会坏死而失去知觉，到了春天必定会溃烂腐坏脱落。如果元气没有亏损，虽然患病也无大碍；但如果外用寒凉药物，内服清热解毒的药剂，就会损伤元气，必然导致败症（无法治愈的重症）。凡是刚受冻的时候，用热手频繁熨烫是最好的。北方人耳朵冻伤，如果误用手去触碰，耳朵就会脱落。极寒确实能撕裂皮肤、使手指脱落，这是可信的。
有一个几岁的女孩，正值严寒时节北上，因为失去了依靠（父母），脚部受冷，侍婢用热汤给她泡脚，到了春天房间里污秽之气熏蒸，她父亲察觉后，脱下袜子发现十个脚趾全部腐烂，但还没有脱落。我使用托里透脓的药剂来辅助她的阳气，促使坏死组织脱落以保全生命。
有一个小孩在仲冬严寒时节，两只耳朵受冻，不知道痛痒。让人用热手慢慢地、频繁地熨烫，内服温补脾气的药剂，并外敷白蔹散而痊愈。
有一个七岁的小孩，冬天脚趾冻痛，用烧开的热水浸泡清洗，到了春天溃烂脱落，疮口不愈合，脚踝肿痛。我说这是因为元气虚弱，必须补益胃气来生肌长肉。家属不信，于是使用寒凉解毒的药剂，肿胀消退后变成黑色，自以为好了。我说：“这是脾胃极度虚弱，元气不能运送到患处。”后来双腿消瘦细弱而死。
有一个少儿轻微跌打损伤足部，随即形成冻疮，疼痛不止，用火烘烤导致肌肉坏死，到了春天脚部脱落，脓水淋漓，不能收敛而死亡。这种病症如果能调养脾胃，使元气不受损伤，那么肌肉自然生长，怎么会至于死亡呢！
Frostbite of the toes is caused by innate constitutional deficiency and timidity, making it easy for cold pathogens to invade. This leads to stagnation of Qi and blood; if left untreated for a long time, it will ulcerate and form sores. The treatment method must strengthen the Spleen and Stomach and warm the Qi and blood, so that necrotic flesh will naturally slough off and healthy flesh will naturally regenerate. If bones are exposed and tendons remain connected, the necrotic tissue should be promptly excised; otherwise, the toxin will spread to the dorsum of the foot, leading to death. This is because at the extremities of the limbs, Qi and blood have difficulty reaching, and they are blocked by external pathogens, preventing the circulation and operation of Qi and blood. If hot water is used to scald or fire to bake, the flesh there will die and become insensible, and by spring it will inevitably ulcerate, rot, and fall off. If the Yuan Qi (Original Qi) is not depleted, although the disease occurs, it is not harmful. However, if cold medicines are applied externally and detoxifying agents are taken internally, the Yuan Qi will be injured, inevitably resulting in a "bai zheng" (failure syndrome/incurable condition). Whenever frostbite first occurs, frequently rubbing with warm hands is the best approach. In the north, ears affected by frostbite will fall off if mistakenly touched by hand. Extreme cold can indeed split the skin and cause fingers to drop off; this is true.
A girl of several years old traveled north during severe cold. Having lost her support (parents), her feet were chilled. A maid soaked them in hot water. By spring, due to foul air in the room, her father noticed upon removing her socks that all ten toes were rotten, though not yet detached. I used a formula to support the interior and boost Yang Qi, promoting the sloughing of necrotic tissue to preserve life.
A child suffered frostbite on both ears during the severe cold of mid-winter, losing sensation of pain and itch. He was treated by having his ears gently and frequently rubbed with warm hands. Internally, he received herbs to warm and tonify Spleen Qi, and externally Bai Lian San (White Peony Powder) was applied, leading to recovery.
A seven-year-old child experienced frostbite pain in the toes during winter and soaked them in boiling water. By spring, the tissue ulcerated and fell off, but the wounds failed to heal, accompanied by swelling and pain in the ankle. I stated that this was due to weak Yuan Qi, requiring tonification of Stomach Qi to generate muscle tissue. The family did not believe me and instead used cold-natured detoxifying agents. Although the swelling subsided, the area turned black, and they considered themselves cured. I said, "This indicates extreme deficiency of the Spleen and Stomach, where Yuan Qi cannot reach the affected area." Later, the child's legs became emaciated and thin, and he died.
A young boy sustained minor trauma to his foot from a fall, which subsequently developed into frostbite with unceasing pain. Fire baking caused the flesh to die. By spring, the foot detached, with profuse pus discharge, failing to heal, leading to death. If this condition had been managed by regulating the Spleen and Stomach and preserving Yuan Qi, muscle tissue would have regenerated naturally, avoiding death.
Bai Lian San (White Peony Powder)
Bai Lian (Radix Ampelopsis, 1 liang) Huang Bo (Cortex Phellodendri, stir-fried until black, 5 qian)
Grind the above ingredients into powder and apply dryly to the affected area.