I have a rash on my inner thigh. it is unilateral, not painful, not itchy but has come up with lesions and scabs. herpes? or something else?

Herpes? Shingles?: If "lesions" means blisters or sores and rash is recent (a few days) and not long lasting, I would be more suspicious of herpes zoster (shingles). Genital herpes also is possible. Or a simple allergic reaction, or any of several other kinds if dermatitis. Earlier makes diagnosis easier and is very important for successful treatment of either herpes or shingles, so see a doctor ASAP.