The mother is always worried about her son who is far away.
Tips
memory
挂 (to hang) + 心 (heart) — something is 'hung up' on your heart, weighing on you. The same image lies behind 牵挂 (to feel concern, to be tied up emotionally).
usage
Warmer and more affectionate than 担心 (dānxīn, 'to worry'). 挂心 carries the sense of caring concern from a loved one — a parent for a child, a friend for a friend — rather than anxiety about a problem.
