How long after shaving this region did you notice the bumps? If they are painful & burn, then herpes
infection needs to be borne in mind. One does not routinely test for herpes in an STD
package. Please check & if not doe, do a herpes IgG
& IgM test for herpes 1 & 2 viruses'. The result will give you a clearer picture. If all well, then do consider a pseudofolliculitis picture & this may arise from shaving against the grain with ingrown follicles being the root cause. Do consider an antibiotic course with antinflammatory agents added eg doxycycline & ibuprofen
that may help you further but will require the prescription from your GP/Physician/Dermatologist
& the dose would vary as per your body weight et al. Cheers & Good Luck!
Dr Praveen Rodrigues MD