Regardless whether you do this at home or on the road, make sure you have 1) triple antibiotic ointment for any possible infections from tiny invisible lesions, and 2) hydrocortisone ("anti-itch") ointment to deal with any swelling and/or inflammation. Get the ointment, not the creme, form of each- ointment is more like vaseline texture and stays put better.
The hydrocortisone is great stuff- it cures saddle sores from cycling better than anything, and is good for all forms of skin chafing, strange scaly patches that develop, Inflamed Money Butt, etc. i first learned of this stuff years ago from a NYC bike messenger comrade (hello Teamster Eric if you are out there) whose dad was a dermatologist. Never leave home without it.
And wash your hands before doing the stretching (goes without saying anywhere else, but some folks here might need to be told this).