Herpes zoster can cause swelling. Herpes zoster is an infectious skin disease caused by reactivation of the varicella-zoster virus, which has long been latent in the posterior root ganglia of the spinal cord or in the ganglia of the brain. Skin lesions are most commonly associated with herpes zoster and may include flushing, swelling, and a rash with neuralgia. The affected skin may be self-conscious with a burning sensation or neuralgia, or the rash may develop without prodromal symptoms. The affected area often first appeared flushed spot, soon appeared millet to soybean size papules, cluster distribution without fusion, followed by rapid change into blisters, blisters between clusters of groups of normal skin, blisters rupture place or the patient due to pain self-conscious scratching will lead to swelling. If you have herpes zoster, it is recommended that you go to the hospital in time to avoid adverse consequences.