Aspirin is a widely used medication that is known for its pain-relieving and anti-inflammatory properties. However, it is also known to have some side effects, one of which is the potential to cause stomach ulcers.

According to the National Health Service (NHS) [2], aspirin can cause irritation and inflammation of the stomach lining, which can lead to the formation of stomach ulcers. The risk of developing stomach ulcers is higher in people who take aspirin regularly or in high doses. Other factors that can increase the risk of developing stomach ulcers include being over 65 years old, having a history of stomach ulcers, and taking other medications that can irritate the stomach lining.

A study published in the National Center for Biotechnology Information (NCBI) [3] supports this claim. The study found that aspirin can cause damage to the stomach lining, which can lead to the formation of ulcers. The study also found that the risk of developing ulcers was higher in people who took aspirin regularly or in high doses.

It is important to note that not everyone who takes aspirin will develop stomach ulcers. However, if you experience symptoms such as stomach pain, indigestion, or black stools while taking aspirin, you should contact your doctor immediately.

In conclusion, aspirin can cause stomach ulcers, especially in people who take it regularly or in high doses. It is important to be aware of this potential side effect and to contact your doctor if you experience any symptoms of stomach ulcers while taking aspirin.

Sources:
[2] https://www.nhs.uk/medicines/aspirin-for-pain-relief/side-effects-of-aspirin-for-pain-relief/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5478398/