unfortunately i have no way of determining if the conditioner might be the cause since i do not know what you are using and of course i have no way of examining the sores on your scalp. you have two options: see your primary care provider or see a dermatologist. take the conditioner with you to that visit. my choice would be the dermatologist since they are skin experts and may be able to solve this chronic scalp problem.
i have sores on my scalp and think conditioner is the cause. for a couple years i have had small sores dotting my scalp that can be itchy especially if i go a day without washing my hair or after i dye it. my grandmother has a similar condition and she believes that using conditioner while washing is a cause. she has stopped using conditioner and i think her sores have gone away. i cannot stop using conditioner because my hair becomes very dry and brittle when i do not use it. but i am not sure if conditioner is the exact cause to the sores.