Brief Answer:
Wide range of differential diagnosis, require symptomatic details further .

Detailed Answer:
Hello dear
I evaluated your query thoroughly .
* Differential diagnosis of upper right side abdominal pain include very wide
range as
- muscle sprain / costochondral
- liver disorders ( hepatitis , abscess , cyst , tumor , other )
- gall bladder conditions ( cholecystitis , gall stone , polyp , other )
- biliary duct problem ( CBD stone , stricture )
- certain stomach issues
- duodenum lesions ( inflammation , other )
- peri ampullary lesions , pseudo pancreatic cyst
- colon problem ( hepatic flexure disorders )
- diaphragm or lower lobe lung pathology ( as pleural effusion right side )
- external trauma / blunt injury induced hematoma
- appendicitis ( in subhepatic position )
- associated with right renal problems at times
- others
* Kindly mention your symptoms in details which will allow me to narrow down the list
1. pain - type , intensity , frequency , severity , referred anywhere , duration
relation with food or empty stomach , other aggravating / relieving factors
any posture related or activity like exercise causing more pain
2. any history of trauma
3. associated features as vomiting , fever , loss of appetite
4. cough / breathlessness
5. bowel habits , urinary problems , weight alterations
6. back ache
7. yellow urine , white or clay color stools
8. intake of alcohol
9. any other systemic illness
10.history of any surgery over abdomen
11.any other information you would like to share with me regarding this

Awaiting for your details so that I can answer you as soon as possible .
Regards .

---