There may be pain in the muscles and soles of the feet, and eyelids may become swollen. Other symptoms may be nausea, profuse perspiration, tremors, labored breathing and speech, and vomiting. During this time, a feeble pulse, cold clammy skin, unconsciousness, convulsions and even death may result if the victim does not receive medical attention immediately. Additional complications may occur due to the infection of the bite. However, with some untreated individuals, symptoms may diminish in several hours and be gone in several days after agony.
Bites are uncommon and serious long-term complications or death are rare.
Only four deaths were officially attributed to black widow bites in the United States from 1960-69. If bitten, remain calm, collect the spider, if possible, for positive identification and get medical attention immediately. First aid is of limited help. Application of a mild antiseptic such as iodine or hydrogen peroxide prevents infection. Persons younger than 16 and older than 60, especially those with a heart condition, may require a hospital stay.