You are a filial child, you care about your father's health and praise you.
Constipation in the elderly. You need to observe your father's eating habits to see if he takes enough dietary fiber, drinks enough water, and gets angry easily if he stays up late. If these conditions do not exist, it is likely that the elderly are qi-deficient. If they can take soup medicine, they can ask Chinese medicine to prescribe medicine for conditioning. If it is inconvenient to take the decoction, you can take some Buzhong Yiqi pills, and do not advocate the use of laxatives. Laxatives are often cold, which is not good for the elderly and may lead to more deficiency of middle qi.
I wish your parents health and longevity!