What are the signs of a bacterial infection? Common signs include persistent fever, localized redness, warmth, swelling, and pain, often accompanied by pus or cloudy discharge. Systemic symptoms may include fatigue, chills, body aches, and elevated heart rate. Gastrointestinal infections can cause diarrhea, nausea, or abdominal cramps, while respiratory infections may produce cough with thick sputum or shortness of breath. Symptoms usually worsen rather than improve over time. Diagnosis often requires clinical evaluation and testing. Treatment may involve antibiotics prescribed by a clinician; information about options, including cephalexin capsules wholesale, is typically relevant to pharmacies and distributors, not for self-medication.