My partner has severe stomach pains (cramps) located on the left side of the abdomen, with no diarrhea or fever, slightly swollen.

Based on the symptoms described, it is recommended that your partner consult a healthcare professional. The location and intensity of the pain, along with the swelling in the abdomen, are concerning and may indicate a possible intestinal issue. While over-the-counter medications may not be suitable in this case, staying hydrated with oral rehydration solutions from the pharmacy is important. Applying a warm compress to the painful area may help ease discomfort from intestinal spasms. If these measures do not provide relief, it is best to seek medical advice.