Blood in stool why

what is the treatment of blood in stool :
1. consult and internal medicine doctor to do the needed medical examnation 
2. have a healthy diet which is rich with fibers 
3. have a plenty of water and vitamin C 
4. avoid smoking and exercise 
5. in case of constipation , you may take laxitives medication when you need besides following the above advices 
6. in case of anal fissure or hemorroids , doctor may prescrbie medication to heal anal fissures such as : emla topical and salt bath sitz 
7. in case ulcers or chronic inflammations in intestines , doctor may prescribe antibiotics and do advanced examnation to determine the causes 
8.you  also may take pain killer on need time 
what are the possible causes :
1. anal fissure 
2. hemorriods ( common ) 
3. chronic lesions and inflammation in lower GI tract
4. infections such as ameba 
the needed medical examnation :
1. physical examnation by doctor 
2. blood and blood chemistry 
3. stool test
4. abodminal CT