小儿吐泻，以钱氏益黄散、白术散为主，随证加减。小儿夏月吐泻，益元散最妙。小儿吐泻不止，恐成慢惊。
钱氏五泻、五补药俱可用。治吐泻及黄胆∶三棱、莪术、陈皮、青皮、神曲、麦芽、黄连、甘草、白术、茯苓，上
末，米汤调服。伤乳食吐泻者，加山楂；时气吐泻者，加滑石；发热者，加薄荷。吐泻腹痛，吐乳泻者，亦是寒，调脾
胃，平胃散入熟蜜，加苏合香丸相半，名万安膏，米饮下。万安丸壮胃进食，止吐泻∶白术 茯苓 人参（各一钱半） 陈
皮苍术 浓朴 猪苓 泽泻（各五钱） 干姜（三钱） 官桂（二钱） 甘草（二钱半） 上为末，炼蜜丸，梧桐子
大，每服五丸，食前米汤化下。
小儿痢疾，黄连、黄芩、陈皮、甘草煎服。赤痢加桃仁、红花；白痢加滑石末。治小儿食积，痢下纯血，炒
曲、苍术、滑石、白芍药、黄芩、白术、陈皮、甘草、茯苓，煎汤下保和丸。小儿久痢不止，水谷不消，枳壳为
末，米饮调服二钱。小儿赤痢，青盐捣汁，每服半盏。
蛔虫攻心，薏苡仁极浓煎汁服。又方，使君子以火
煨，任意食之，以壳煎汤送下。蛔虫疼痛，汤氏方云，诗云∶本为从来吃物粗，虫生腹内瘦肌肤，盛吞甜物多生痛，
怕药愁啼肉渐枯。形候只看人中上，鼻头唇下一时乌，沫干痛定虫应退，取下蛔虫病却无。其方用安神散∶干漆（二
钱炒令烟出） 雄黄（五钱） 麝香（一钱） 上为末，三岁半钱，空心苦楝根汤下。凡取虫之法，须是月初服药，
虫头向上药必效。治寸白虫，以东行石榴根一握，洗锉，水三升煎至半碗以下，五更初温服，如虫下尽，以粥补之。
化虫丸∶鹤虱（炒） 槟榔 胡粉 苦楝根（五钱） 白矾（半生半枯共三钱） 上为末，糊丸，
小豆大，每服三十丸，酒浆生油下。又治蛔虫咬心吐水，鹤虱为末，蜜丸，空心蜜汤或醋汤下三十丸。治蛔虫方，
以楝树根为君，佐以二陈汤煎服。小儿冬月吐蛔虫，多是胃寒胃虚而出，钱氏白术散加丁香二粒。治虫丸∶胡黄连（
一钱） 槟榔（一钱） 陈皮（一钱） 神曲 郁金 半夏 白术（各二钱） 雷丸（一钱） 上为末，糊丸。
小儿吐泻，以钱乙的益黄散、白术散为主方，根据具体证候进行加减。小儿夏季发生吐泻，使用益元散最为适宜。若小儿吐泻不止，担心会演变为慢惊风（慢性惊厥）。
钱乙的五泻方和五补方均可使用。治疗吐泻及黄疸：用三棱、莪术、陈皮、青皮、神曲、麦芽、黄连、甘草、白术、茯苓，研为细末，用米汤调服。因乳食积滞导致吐泻者，加山楂；因时行疫气导致吐泻者，加滑石；伴有发热者，加薄荷。若吐泻且腹痛，呕吐乳汁并腹泻，这也属于寒证，需调理脾胃，将平胃散加入熟蜂蜜，再与苏合香丸等量混合，名为万安膏，用米饮送服。万安丸能壮胃气、增进食欲、止吐泻：白术、茯苓、人参（各一钱半）、陈皮、苍术、厚朴、猪苓、泽泻（各五钱）、干姜（三钱）、官桂（二钱）、甘草（二钱半），研为细末，炼蜜为丸，如梧桐子大小，每次服用五丸，饭前用米汤化开服用。
小儿痢疾，用黄连、黄芩、陈皮、甘草煎汤服用。赤痢（便下脓血）加桃仁、红花；白痢（便下黏液）加滑石粉。治疗小儿食积引起的痢疾，下纯血，用炒神曲、苍术、滑石、白芍药、黄芩、白术、陈皮、甘草、茯苓煎汤，送服保和丸。小儿久痢不止，水谷不消化，将枳壳研为细末，用米饮调服二钱。小儿赤痢，用青盐捣汁，每次服用半盏。
蛔虫上攻心胸，用极浓的薏苡仁煎汁服用。另一方法，将使君子用火煨熟，随意食用，并用使君子壳煎汤送下。蛔虫疼痛，汤氏方记载一首诗说：“本来是因为平时饮食粗糙，虫生在腹内导致身体消瘦，大量吞食甜食容易引发疼痛，害怕吃药忧愁啼哭导致肌肉逐渐枯瘦。观察形态只看人中部位，鼻头唇下一瞬间变黑，口水干了疼痛停止说明虫应已退去，排出蛔虫后病就没了。”该方使用安神散：干漆（二钱，炒至烟出）、雄黄（五钱）、麝香（一钱），研为细末，三岁儿童服半钱，空腹时用苦楝根汤送服。凡是用法驱虫，必须在月初服药，此时虫头向上，药效必定显著。治疗寸白虫（绦虫），取向东生长的石榴根一把，洗净锉碎，用水三升煎至半碗以下，五更初温服，如果虫子排尽，用粥来调养补充。化虫丸：鹤虱（炒）、槟榔、胡粉、苦楝根（五钱）、白矾（半生半枯共三钱），研为细末，糊丸，如小豆大小，每次服用三十丸，用酒、浆、生油送服。又治蛔虫咬心吐水，将鹤虱研为细末，蜜丸，空腹时用蜜汤或醋汤送服三十丸。治疗蛔虫的方子，以楝树根为君药，辅以二陈汤煎服。小儿冬季吐出蛔虫，多是胃寒胃虚所致，可用钱乙的白术散加丁香两粒。治虫丸：胡黄连（一钱）、槟榔（一钱）、陈皮（一钱）、神曲、郁金、半夏、白术（各二钱）、雷丸（一钱），研为细末，糊丸。
Pediatric vomiting and diarrhea are primarily treated with Qian's Yihuang San (E Huang Powder) or Baizhu San (Atractylodes Macrocephala Powder), modified according to the specific syndrome. For pediatric vomiting and diarrhea occurring in summer, Yi Yuan San (Benefit the Origin Powder) is most excellent. If pediatric vomiting and diarrhea persist, there is a fear of it developing into Man Jing Feng (Slow Convulsion).
Qian's Five Diarrhea Formulas and Five Tonification Formulas can all be used. To treat vomiting, diarrhea, and jaundice: use Sanleng (Rhizoma Sparganii), Ezhu (Rhizoma Curcumae), Chenpi (Pericarpium Citri Reticulatae), Qingpi (Pericarpium Citri Reticulatae Viride), Shenqu (Massa Medicata Fermentata), Maiya (Fructus Hordei Germinatus), Huanglian (Rhizoma Coptidis), Gancao (Radix Glycyrrhizae), Baizhu (Rhizoma Atractylodis Macrocephalae), and Fuling (Poria), grind into fine powder, and take with rice water. For vomiting and diarrhea caused by milk or food stagnation, add Shanzha (Fructus Crataegi); for those caused by seasonal epidemic qi, add Huashi (Talcum); if accompanied by fever, add Bohe (Herba Menthae). If vomiting and diarrhea are accompanied by abdominal pain, vomiting of milk, and diarrhea, this also indicates Cold; regulate the Spleen and Stomach, mix Pingwei San (Calm the Stomach Powder) with cooked honey, combine equally with Suhexiang Wan (Styrax Pill), name it Wan'an Gao (Wan'an Paste), and administer with rice drink. Wan'an Wan (Wan'an Pill) strengthens the Stomach, promotes appetite, and stops vomiting and diarrhea: Baizhu (Rhizoma Atractylodis Macrocephalae), Fuling (Poria), Renshen (Radix Ginseng) (each 1.5 qian), Chenpi (Pericarpium Citri Reticulatae), Cangzhu (Rhizoma Atractylodis), Houpo (Cortex Magnoliae Officinalis), Zhuling (Polyporus), Zexie (Rhizoma Alismatis) (each 5 qian), Ganjiang (Rhizoma Zingiberis), Guangui (Cortex Cinnamomi) (2 qian), Gancao (Radix Glycyrrhizae) (2.5 qian). Grind into fine powder, refine honey to make pills, size of Sophora japonica seeds, take 5 pills each time, dissolve in rice water before meals.
For pediatric dysentery, decoct Huanglian (Rhizoma Coptidis), Huangqin (Scutellariae Radix), Chenpi (Pericarpium Citri Reticulatae), and Gancao (Radix Glycyrrhizae) for oral administration. For red dysentery (dysentery with blood), add Taoren (Semen Persicae) and Honghua (Flos Carthami); for white dysentery (dysentery with mucus), add Huashi powder (Talcum). To treat pediatric food stagnation causing dysentery with pure blood, decoct Chaoqu (Fried Massa Medicata Fermentata), Cangzhu (Rhizoma Atractylodis), Huashi (Talcum), Shaoyao (Radix Paeoniae Alba), Huangqin (Scutellariae Radix), Baizhu (Rhizoma Atractylodis Macrocephalae), Chenpi (Pericarpium Citri Reticulatae), Gancao (Radix Glycyrrhizae), and Fuling (Poria) as soup, and take Baohe Wan (Preserve Harmony Pill) with it. For persistent pediatric dysentery where water and grain are not digested, grind Zhike (Fructus Aurantii) into powder, take 2 qian mixed with rice drink. For pediatric red dysentery, crush Qingyan (Natrii Chloridum) to extract juice, take half a cup each time.
When Ascaris attacks the heart/chest, drink extremely concentrated decoction of Yiyiren (Semen Coicis). Another method: roast Shijunzi (Fructus Quisqualis) over fire, eat at will, and swallow with decoction made from its shells. For pain caused by Ascaris, Tang's formula records a poem: "Originally due to rough diet, worms grow inside leading to emaciation; excessive sweet foods cause pain, fear of medicine and crying lead to withered flesh. Observe the form at the philtrum, the nose tip and under lips turn black suddenly; when saliva dries and pain settles, the worm should retreat; expelling the Ascaris means the disease is gone." This formula uses Anshen San (Calm the Spirit Powder): Ganxi (Resina Taxodi, stir-fried until smoke appears) (2 qian), Xionghuang (Realgar) (5 qian), Shexiang (Moschus) (1 qian). Grind into fine powder, 0.5 qian for three-year-olds, taken on an empty stomach with Koushen Gen Tang (Bitter Chinaberry Root Decoction). For all methods of expelling parasites, medication must be taken at the beginning of the month, when the worm heads upward, ensuring efficacy. To treat Taenia solium (white tapeworm), take one handful of Shi Liugen (Root Bark of Punica Granatum) growing eastward, wash and chop, decoct in three sheng of water until reduced to less than half a bowl, take warm at the first watch of the night (Wugeng); if worms are fully expelled, replenish with congee. Huachong Wan (Expel Parasite Pill): Leshi (Semen Ardisiae), Binglang (Arecae Semen), Hufen (Cerussa), Koushen Gen (Radix Meliae Toosendan) (5 qian), Baifan (Alumen) (half raw, half calcined, total 3 qian). Grind into fine powder, make pills with starch paste, size of Vigna angularis seeds, take 30 pills each time, swallow with wine, malt liquor, or raw oil. Also treats Ascaris biting the heart and vomiting water: grind Leshi (Semen Ardisiae) into powder, make honey pills, take 30 pills on an empty stomach with honey water or vinegar water. For treating Ascaris, use Koushen Gen (Radix Meliae Toosendan) as the sovereign herb, assisted by Erchen Tang (Two Aged Herbs Decoction) for decoction and administration. In winter, pediatric vomiting of Ascaris is mostly due to Stomach Cold and Deficiency; use Qian's Baizhu San (Atractylodes Macrocephala Powder) adding two Dingxiang (Flos Caryophylli). Zhichong Wan (Parasite-Expelling Pill): Huhuanglian (Rhizoma Coptidis Teetae) (1 qian), Binglang (Arecae Semen) (1 qian), Chenpi (Pericarpium Citri Reticulatae) (1 qian), Shenqu (Massa Medicata Fermentata), Yujin (Radix Curcumae Longae), Banxia (Rhizoma Pinelliae), Baizhu (Rhizoma Atractylodis Macrocephalae) (each 2 qian), Leiwan (Semen Walsurae). Grind into fine powder, make pills with starch paste.