Sudden swelling of the upper eyelid may be due to mosquito bites, allergic conjunctivitis, infectious conjunctivitis and other causes.
1. Mosquito bites: Mosquito bites can cause toxins to accumulate in the local tissue interstitial space, leading to symptoms of tissue edema.
2. Allergic conjunctivitis: contact with pollen, seafood, irritating chemicals, animal tissues induces allergic reactions in the lid conjunctiva, resulting in tissue congestion and edema, often accompanied by itching, rash and other symptoms.
3. Infectious conjunctivitis: frequent rubbing of the eyes with the hands and other pathogens lead to bacteria, viruses and other pathogens infected eyelid conjunctiva, triggering local acute inflammatory reaction, redness, swelling and hot pain symptoms.
Sudden swelling of the upper eyelid may also be related to other causes, it is recommended to consult a doctor in a timely manner, a clear diagnosis, and follow the doctor’s instructions for treatment.