Why does any light activity make my body tense up real bad where i am in a lot of pain. my boyfriend tries to massage me but it hurts to be touched.

Yuo cant touch this: Hyperalgesia is when simple touch elicts pain. it can be a side effect of opioid medications. Fibromyalgia is asociated to specific trigger points . Rest fluids correcting potasium and magnesium may be required based on blood tests. Exercisse is helpful, mindfull meditation, streching Arnica batch flowers and acupuncture are alternatives

Fibromyalgia?: Fibromyalgia could be a cause. A good source of info is mayoclinic.org/patientinformation. However, any condition that directly or indirectly affects the skeletal muscles can cause pain w/ exercise. These include anemia, sickle cell, heart or hormone problems, muscle or joint inflammation and electrolyte & fluid imbalance, You seem to really be suffering. Please see a doctor ASAP.

Spasms: many causes of muscle spasms, too many for this short space . bottom line you need a full work up with your doctor..simple causes dehydration/electrolyte imbalance,over use or over stretching of a muscle group complex:multiple sclerosis,lead poisoning,diabetes,hypothyroidism,neurotransmitter imbalance,prescription meds-esp psych med follow up with specialist soon

Muscle tension: Probably because you are not used to exercise and even your light activity is more than your muscles want. Try starting to exercise for 5 minutes and then increase by 5 minutes on a weekly basis making sure you keep well hydrated.