Do you have a blood test for psoriasis?

No. Psoriasis is usually obvious clinically, and few diseases mimic it. When in doubt, it can be biopsied. If you've been told you have psoriasis, but it doesn't seem to be the typical illness, it might be time to get a biopsy or another physician's thoughts.

Related Questions

I recently increased my intake of Vit D to correct level highlighted in blood test. I think it is helping my psoriasis. What is the max dose? Thanks

Depends on level. Oral dosing of Vitamin D depends upon the nature and severity of the deficiency. Common practice is to treat with 50,000 Units of Vitamin D2 or D3 once per week for 8 weeks followed by a dose needed to maintain the target dose 25 (OH) D level. Monitor the level with blood tests. Maintenance doses can range from 800 to 2000 units depending on your levels. Note you can take too much Vitamin D. Read more...
10,000 iu/day. it is generally safe to take 10,000 iu of D3 per day. Toxicity is very rare unless taking at least 40,000 iu/day. Many experts feel blood levels of 50-80 are optimal. While >100 is considered toxic, symptoms of toxicity are rare below 200. For optimal benefits also supplement with Vit K & A, as D, K and A work together synergistically. Try 10,000 of D/day & in a few months check your blood level. Read more...
Vitamin D. The max dose is 5000 unit tablets once a week but most people need only 1000 units a day at a cost much lower than the 5000 unit tablets. It is available over the counter. Remember - too much of a good thing is no good for you. Read more...