Jill,
A few questions regarding risk for blood clots. Have you traveled recently on long plane trips or car rides? Are you on birth control pills or hormone therapy? Have you had any recent surgery or given birth recently?
Where exactly is the hot red spot on your leg?
How old are you?
Do you have a headache, photophobia, fever, chills sweating, fatigue, malaise, exhaustion, and or generalized aches and pains?
Usually, with Herpes Zoster-Shingles, the pain and rash is preceded by some of the above symptoms!
You usually feel a burning, lancinating, pain, constant, only in the area where the rash will appear, or slightly larger. It is a Neurogenic pain. The rash will appear in crops of vesicle-blisters on a red base over a period of 5- 7 days on a dermatome.
To distinguish Herpes Zoster-Shingles from a deep vein thrombosis or blood clot, the patient's history should be asked of the initial questions.
Since your leg is hot, look at it and compare it to the other and see if it is more swollen than the other. Usually, with shingles pain, we don't feel a throbbing pain.
I am concerned with your pain description and hot red spot that you have either a DVT- blood clot or cellulitis.
I would go now to an A&E. The Physician could have done a D-Dimer and CBC and imaging to evaluate for a DVT or cellulitis. The problem with a DVT is that the clot can travel to your lungs. The problem with cellulitis is you can become septic, fast. Either can kill quickly. As you feel something is wrong, obey your instincts and get it checked out now.
I am a Nurse Practitioner in the States.
Please let me know what happens. Vi shall be thinking of you.
All my best wishes.
Merry Juliana