It sounds like you may be experiencing a skin irritation or folliculitis, which can occur when hair follicles become inflamed. This can happen due to shaving, leading to bumps and itching. While antibiotics can help with bacterial infections, they may not be effective for irritation. Consider using a gentle, fragrance-free shaving cream, and avoid shaving too closely. Moisturizing the area regularly can also soothe the skin. If symptoms persist or worsen, please consult a dermatologist. They can provide a thorough assessment and suggest appropriate treatments tailored to your needs.