What Causes Itchy Lumps On The Lower Part Of The Body?

The skin from my waist down has many bumps. They itch. various sizes but most are no bigger than a pencil eraser. some are tiny. Like sand. mostly on the feet and ankles. No discoloration. The problem started 7/11/2016. I don t think it is fleas. I have dogs. We go for walks in the woods often so maybe it is poison ivy/sumac, etc.? I took a hot bath with epsom salts this morning @ 08:00. Felt good. Still itched afterwards. Put calamine lotion on this afternoon @ 16:00. Helped a little. Still itch a little. I am hypertensive. I take Hydroclorothyazide tabs, 25mg, Amlodipine / Benazepril caps,10/40 mg. Pot Chlor Er tabs 10Meq and Fluticasone Propionate nasal spray 50 mcg all once a day. For the last six years. I take vitamins too. Biotin, 5000 mcg, Berberine Gluco Defense, 500 mg. Preservision AREDS 2 formula,500 mg, Milk thistle, 240mg. and odorless garlic,75mg. I take all once a day after I take my meds. The AREDS 2 and Berberine I take 2 and three times a day. I am 5 9 tall, 200 lbs. white Male, age 56. That s about it for now. Thank you for your help in this matter. Regards, Mark R. Boschian