In addition, the grave also represents the buried memory, so this dream may also imply that the dreamer is troubled by the memory.
If you interpret dreams directly, it implies that you miss your grandmother very much.
Dreaming of crying implies that the dreamer has accumulated a lot of pressure in the real situation, so he dreams of crying in order to vent his pressure.
The sadder you cry in your dream and the louder you cry, the greater the pressure you accumulate.
Good luck!