Hello i have noted your concern,
Here the drop in HB is due to loss of blood, and to stop the loss of blood he needs to undergo investigations like endoscopy/ colonoscopy or CECT abdomen to look for, where the blood is leaking from and then proceed accordingly, for which he also needs hospital care for proper monitoring, treatment and management, as patient loose continuously blood internally he can go into hemorrhagic shock and other complications which can be life threatening.
Next Steps
Kindly admit him in a tertiary care center, a multi speciality hospital, where proper care and treatment can be given.
Health Tips
Watch for black stools or black color or blood stained vomiting, dizziness, low blood pressure, fever and breathing difficulty.
Immediately seek medical attention