Active and Passive Immunity. Naturally acquired active immunity occurs when the person is exposed to a live pathogen, develops the disease, and becomes immune as a result of the primary immune response. Artificially acquired active immunity can be induced by a vaccine, a substance that contains the antigen.
Lower back tightness can cause muscle twitching, pain and reduced range of motion. Lower back muscle tightness is the cause of a muscle spasm. This can be brought on by a strain, overuse or muscle weakness, according to BetterMedicine.com.
Causes of Menstrual Back Pain. There could be three reasons for back pain during the womanâs menstrual cycle. This includes: Dysmenorrhea: When the uterus contracts sharply the result is cramping whether it be in the abdomen, upper thighs or back. This is one of the leading causes of back pain during the menstrual cycle.