Arms & legs ache, mild psoriasis, fatigue, knee hurts & hands cramp up & hurt my legs have ached since i was little. +ana & low vitamin d. what is it?

Autoimmune: In august 2009 scientific american reported on the correlation between gluten sensitivity, leaky gut & autoimmune disease, which you apparently have considering the positive ana, muscle/joint pain and psoriasis. Putting it all together, your vitamin d deficiency would then stem from an inability to absorb fats & fat soluble vitamins like a, d, e & k common to people with gluten issues.

SLE/Lyme/RA/Pso.A.: Your general signs (arms & legs ache, mild psoriasis, fatigue, knee hurts & hands cramp up) suggest lupus as well as lyme disease, rheumatoid, and psoriatic arthritis. But lupus has a +ana, lupus and RA are symmetric, psoriatic can be asymmetric, and lyme can have generalized musculoskeletal pain. Low vit d and achy legs since little may be isolated findings. You likely need more tests/see dr.

God only knows: Need more details but you likely have problems originating in your gut, ie. Food sensitivities, parasites, abnormal bacterial growth or yeast overgrowth or all of the above. In addition you have low vitamin d which could be the cause of all of your symptoms.