I'm sorry to hear that you're experiencing discomfort. Anal itching after using the toilet, along with stomach disturbance, can be caused by several factors including irritation, mild infections, or possibly parasitic infections such as pinworms.

Given the symptoms you describe—stomach upset without diarrhea and anal itching—one possible cause could be a parasitic infection like pinworms, which commonly cause anal itching especially at night or after bowel movements.

Here are some general suggestions:

• Maintain good hygiene by washing the anal area gently with water and mild soap.
• Avoid scratching the area to prevent irritation or secondary infection.
• Keep fingernails trimmed and clean.
• Wash bed linens and clothes regularly in hot water.
• Consider consulting a doctor for proper evaluation and possible stool tests to identify any parasitic infection.

If a parasitic infection is confirmed, medications such as albendazole (an anti-parasitic) may be prescribed to treat it effectively.

Since your symptoms have persisted for several days, I strongly recommend seeing a gastroenterologist or a general physician. They can perform a thorough examination, possibly order tests, and provide appropriate treatment tailored to your condition.

If symptoms worsen, such as severe pain, bleeding, or fever, seek medical attention promptly.To narrow down potential causes, we will need some more information.I understand that you're experiencing a stomach problem and anal itching after using the toilet. Please tell me your age and gender.