Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
I am so glad to find this site. I have suffered a handful of times in my life and could link most of them to some change, food, meds, etc. this time I am stumped. I just went through 2 months of zero (0) fat diet, my gallbladder was failing. I had 2 severe painful bouts before going fatfree. I lost 45lbs, so not such a bad deal. Had surgery, gallbladder taken out. My body does not like fat now- am told it would adjust in 3 months to a year. I used a lotion with goat milk, not realizing it was expired. I broke out from the tip of my finger to just above my elbows, where I had put the cream. But then they spread- everywhere it seems. Big nasty red welts, itch to high heaven. I think it has to do with the fat thing, and also if once in motion of hives, do they have a mind of their own and keep spreading?
Any thoughts would be appreciated.