Lesions of the genitals that come and go always raise concern about herpes. Your description doesn't really sound like herpes. But if the lesions look inflamed/sore, herpes is the best bet; ditto if over several days the lesions evolve from red bumps to blister-like lesions or pimples.
SexBuccal smear
Causes of sexual dysfunction
Child abuse - sexual
Delayed ejaculation
Erection problems
Female sexual dysfunction
Inhibited sexual desire
Orgasmic dysfunction
Puberty and adolescence
Rape
Safe sex shouldn't cause bruising, except perhaps with vigorous oral
sexBuccal smear
Causes of sexual dysfunction
Child abuse - sexual
Delayed ejaculation
Erection problems
Female sexual dysfunction
Inhibited sexual desire
Orgasmic dysfunction
Puberty and adolescence
Rape
Safe sex (i.e., hickey). Masturbation might cause bruising, and I suspect many men would be intimidated about acknowledging masturbation to their wives. But a
bruiseBone bruise
Bruise
Bruise healing - series
Muscle bruise
Skin bruise shouldn't look like a "red spot"; a bruise of the penis looks like a bruise anywhere else.
Should this turn out to be herpes, it doesn't necessarily mean your husband has had other partners. Assuming either of you had other partners before your marriage, either of you could have brought it into the relationship and yet have it show up months or years later. Most cases are asymptomatic.
Good luck-- HHH, MD
HHH, MD