有物有声。名曰呕。干呕则无物。有物无声。名曰吐。呕者有声。吐者则无声。呕吐出物也。胃
气不和。足阳明经。胃脉络。阳明之气下行则顺。今逆而上行。故作呕吐。有胃寒胃热之不同。伤
食胃虚之各异。病既不一。治亦不同。诸吐不止。必因乳食所伤。大要节乳为最。凡吐不问冷热。久
吐不止。胃虚生风。恐成慢惊之症。必须预防。如已成慢脾风症。常呕腥臭者。胃气将绝之兆也。
夏天小儿游戏日中。伏热在胃。或母感冒暑气。承热乳儿。或过食辛热之物。多成热吐。其候
面赤唇红。五心烦热。吐次少而出多。乳片消而色黄是也。法宜分阴阳。运八卦。清肺经HT 门至横
纹。补脾土。揉外牢。干离重揉。赤凤摇头。捞明月。
冬月感冒风寒。或乳母受寒。承寒乳儿。冷气入胃。或食生冷。或伤宿乳。胃虚不纳。乳片不
化。喜热恶寒。四肢逆冷。吐次多而出少者是也。法用分阴阳。运八卦。推三关。推肺经。推脾土。
推HT 门至横纹。干离重揉。
有声音且有实物吐出，称为“呕”；只有干呕动作而无实物吐出。有实物吐出但没有声音，称为“吐”。所谓“呕”，是指伴有声音的呕吐；所谓“吐”，是指没有声音的吐出。呕吐，即指将胃中之物吐出。
这是由于胃气不和所致。足阳明胃经是胃的脉络所属，阳明之气应当下行才为顺遂。如今气机逆乱而上行，因此导致呕吐。呕吐有胃寒与胃热之不同，也有伤食与胃虚之差异。既然病因不一，治疗方法也各不相同。各种呕吐若不止止，必定是因为乳食所伤。大体上，节制哺乳是最关键的治疗原则。凡是呕吐，不论属寒属热，若久吐不止，会导致胃虚生风，恐怕会演变为慢惊风病症，必须加以预防。如果已经形成慢脾风症，且经常呕吐出腥臭之物，这是胃气即将断绝的征兆。
夏季小儿在烈日下游戏，热气伏藏于胃中；或者母亲感受暑气，带着余热给婴儿喂奶；或者过食辛辣温热之物，多造成热性呕吐。其症状表现为面色红赤、嘴唇红润、五心烦热（手心、脚心及心胸烦热），呕吐次数少但每次吐出量多，乳汁片状消化后颜色发黄。治疗方法适宜采用分阴阳、运八卦、清肺经（从HT门至横纹）、补脾土、揉外劳宫、重揉干离穴、赤凤摇头、捞明月等手法。
冬季感冒风寒，或者乳母受寒，寒气随乳汁传入婴儿体内；或者食用生冷食物，或者损伤了宿存的乳汁，导致胃虚无法纳受，乳汁片块不化，患儿喜热恶寒，四肢厥冷，呕吐次数多但每次吐出量少。治疗方法使用分阴阳、运八卦、推三关、推肺经、推脾土、推HT门至横纹、重揉干离穴等手法。
若因夹带积食而吐出，呕吐物必带有酸臭味，伴有厌恶进食、胃痛、身体出现潮热等症状。治疗方法适宜采用分阴阳、运八卦、揉中脘、按弦走搓摩、揉脐部及龟尾穴、补脾土等手法。
所谓虚吐，是由于胃气虚弱，不能存留乳食而导致呕吐。治疗方法适宜采用分阴阳、运八卦、推三关、多补脾土、运五经、运土入水、从HT门推至横纹等手法。
There is sound and material expelled, termed "Ou" (vomiting with sound); dry heaving involves no material expulsion. There is material expelled without sound, termed "Tu" (vomiting without sound). "Ou" refers to vomiting accompanied by sound; "Tu" refers to expulsion without sound. Vomiting refers to the ejection of gastric contents.
This arises from disharmony of Stomach Qi. The Foot-Yangming Meridian belongs to the Stomach's network vessels; Yangming Qi should descend to be in harmony. Now, Qi rebels and ascends, thus causing vomiting. Vomiting differs between Cold-Stomach and Heat-Stomach conditions, and varies between Food-Injury and Stomach-Deficiency patterns. Since the diseases are not uniform, treatments also differ. For all types of vomiting that do not cease, it must be due to injury from milk or food. Generally, regulating breastfeeding is the most important measure. For any vomiting, regardless of cold or heat, if prolonged vomiting does not stop, Stomach Deficiency generates Wind, which may develop into Slow Convulsion syndrome. Prevention is necessary. If Slow Spleen Wind syndrome has already formed, and frequent vomiting of foul-smelling substances occurs, this is a sign that Stomach Qi is about to perish.
In summer, when children play in the sun, latent heat resides in the Stomach. Or, if the mother contracts summerheat and nurses the infant while carrying heat, or if excessive spicy and hot foods are consumed, Heat-Vomiting often results. Symptoms include red face and lips, five-palm heat (heat in palms, soles, and chest), few vomit episodes but large volume per episode, and yellowish color of digested milk curds. The method should involve Separating Yin and Yang, Moving Eight Trigrams, Clearing Lung Meridian (from HT gate to transverse crease), Tonifying Spleen Earth, Rubbing External Lao Gong, Heavy rubbing of Gan Li points, Red Phoenix Shaking Head, and Scooping Bright Moon.
In winter, contracting wind-cold, or if the nursing mother suffers from cold transmitting cold via milk to the infant, cold qi enters the Stomach. Or, consuming raw/cold foods, or injuring stored milk, leads to Stomach Deficiency failing to accept food, milk curds failing to digest, preference for warmth and aversion to cold, cold limbs, many vomit episodes but small volume per episode. The method uses Separating Yin and Yang, Moving Eight Trigrams, Pushing Three Gates, Pushing Lung Meridian, Pushing Spleen Earth, Pushing HT gate to transverse crease, and heavy rubbing of Gan Li points.
If expelled with retained food, vomit will be sour and foul, accompanied by aversion to eating, stomach pain, and tidal fever. The method should involve Separating Yin and Yang, Moving Eight Trigrams, Rubbing Zhong Wan, String Pressing and Rubbing Motion, Rubbing Umbilicus and Gui Wei point, and Tonifying Spleen Earth.
Regarding Empty Vomiting: It is caused by Stomach Qi deficiency, unable to retain milk and food, leading to vomiting. The method should involve Separating Yin and Yang, Moving Eight Trigrams, Pushing Three Gates, heavily Tonifying Spleen Earth, Moving Five Meridians, Moving Earth into Water, and pushing from HT gate to transverse crease.