In addition to the usual symptoms of sunburn, in severe cases of sunburn (sun poisoning), the individual may experience: 1  fever, 2  nausea, 3  chills, 4  dizziness, 5  rapid pulse, 6  rapid breathing, 7  dehydration, 8  shock with loss of consciousness, and/or.9  severe blisters or soreness.n addition to the usual symptoms of sunburn, in severe cases of sunburn (sun poisoning), the individual may experience: 1  fever, 2  nausea, 3  chills, 4  dizziness, 5  rapid pulse, 6  rapid breathing, 7  dehydration, 8  shock with loss of consciousness, and/or.