My lower legs itch badly. no rash. no new soaps or detergents. often happens during the winter.

Dry skin: Dryness from winter heating systems with lack of adequate humidity in the house causes severe itching. Applying alphakeri lotion to your legs after a shower while they are still wet will restore some moisture to your skin and relieve itching.

Dry skin?: If this is more so in the winter it may be related to dry skin. Start moisturizing with a simple cream or detergent 2-3 times a day and see if this will help the itching to go away.