Redness, cuts, or irritation on the penis after starting Kerendia (finerenone 10 mg) could indicate a possible allergic reaction, skin sensitivity, or an unrelated infection, even though such side effects are uncommon with this medication. You should stop the drug temporarily and keep the area clean, dry, and free from harsh soaps or chemicals, wearing loose cotton underwear. Seek urgent medical attention if there is swelling, severe pain, pus, spreading redness, or any systemic allergic symptoms like rash, difficulty breathing, or dizziness. It’s essential to consult your prescribing doctor or a dermatologist/urologist promptly to determine whether Kerendia should be discontinued, switched, or if the skin problem requires specific treatment.