Expressions such as crying, laughing and even anger in a dream may be close to the dreamer's true feelings, so crying and laughing in a dream may not be a bad thing. Because in real life, people often cannot fully express their emotions, and crying, laughing, and anger in dreams can just vent their depression and become a safety valve for emotions in real life.
If the patient dreams of crying and laughing or dreams of the patient crying and laughing, the disease will be healed.
Repeated crying and laughing in dreams may indicate health problems. If the dreamer shows signs of evil qi in the heart, lungs, and meridians, such as wheezing, shortness of breath, palpitation, head and neck discomfort, throat discomfort, difficulty in urinating, etc., and the above dreams occur repeatedly, he should seek medical treatment promptly.

Interpretation of crying and laughing in the ancient book:
Dream that everyone was laughing and crying under the house, and the main culprit was restless. 'Broken Dream Secretary'
When the patient cries and smiles, the disease is cured. 'The Duke of Zhou Interprets Dreams'