A fungal infection occurs when harmful fungi invade the body, often affecting the skin, nails, or lungs. Common types include athlete's foot, ringworm, and thrush. These infections can cause symptoms like itching, redness, and discomfort, and they thrive in warm, moist environments. Treatment usually involves antifungal medications, which can be topical (applied to the skin) or oral (taken by mouth). It's important to maintain good hygiene and keep affected areas dry to prevent the spread of the infection. In some cases, people with weakened immune systems may be more susceptible to serious fungal infections.