Tell me who had a blockage of the flow, what they did as they treated …

Tell me who had a blockage of the flow, what they did as they treated it? The baby doesn't like and doesn't fuss on one breast. As a result, a small lump formed. The option to give more this breast is not suitable. When I start pumping she freaks out. Therefore, we mostly had to express it. Tell me what can be smeared with which to save oneself.