Hello, I have a single red mark on my calf, about 3 inches below the knee. About the size of a small pencil eraser.   About 6 weeks ago I was clearing out leaves and thought it was an insect bite?  It took awhile to heal,  but recently rubbed/ irritated the scar tissue and it is now sort of itchy, stinging.  Nothing serious, but just thought it odd that it is taking so long to heal?  Can shingles present with just one singular blister? or is there usually a rash?  Thank you
Hi, thanks for your query I can understand your anxiety regarding shingles. Shingles presents as multiple small grouped blisters confined to area of a single nerve supply. Single blister or rash is very rare. Don't worry this does not seem to be shingles as there is history of trauma in your case. Rubbing at the site might have led to infection and redness. For this you may apply a steroid and antibiotic combination cream twice a day. Oral antihistamine tablets for a few days. Don't rub or scratch the lesioned your blood sugar level checked. You may upload images and send us or consult a dermatologist nearby for better help. Hope this helps you