In children, darkening of the lower eyelids and dryness of the stools may be caused by physiological factors such as lack of sleep and improper diet, and generally do not require special treatment. It is also possible that the darkening of the eyelids may be due to allergic conjunctivitis, and the dryness of the stools may be due to indigestion, which needs to be treated with medication for the cause of the problem. 1. Physiological factors: If the lack of sleep, may lead to children’s lower eyelids black. If children drink too little water or eat too much high-fat, oily food, it may lead to dry stools. These conditions are normal and do not require special treatment. Just take enough rest and eat a reasonable diet. 2. Allergic conjunctivitis: If the darkening of a child’s lower eyelids is caused by allergic conjunctivitis, the child should be treated by a doctor. Children need to use antihistamines under the guidance of a doctor, such as levocabastine hydrochloride eye drops, or cetirizine hydrochloride drops. 3. Indigestion: Dry stools in children may be caused by indigestion. Children can take oral medication such as Baohe oral liquid, compound pepsin powder to help digestion under the guidance of the doctor. Oral probiotics such as Bifidobacterium bifidum and Lactobacillus acidophilus can also be taken to regulate intestinal flora. There are many reasons for children’s black lower eyelids and dry stools, so parents are advised to bring their children to regular hospitals to clarify the cause of the disease and actively treat it.