Your husband is having dark purple spots on scrotal skin and else where.
I feel that the condition would be angiokeratoma
There are vascular proliferation developing into dark purple small papules with thick skin..keratosis
You take him to consult dermatologist
for firm diagnosis.
Treatment would be electrocautery under local anaesthesia.
The treatment is simple OPD procedure.
I hope you got my answer.
Dr. Ilyas Patel MD