A lump on the ribs after climbing a mountain may be a bony mass or a soft tissue mass, but it is not necessarily caused by climbing a mountain. 1. Bony lumps: for example, osteosarcoma of the ribs, chondroma, bone cysts, etc. These lumps will be manifested in the form of pimples, and these pimples are generally not caused by mountain climbing. 2. Soft lumps: for example, sebaceous cysts, lipomas and so on. Soft lumps are soft in texture, and the continued development of the lumps will cause compression symptoms, swelling and pain in the affected area, and lumps on the ribs, coupled with mountain climbing exercises may aggravate the local symptoms. A lump on the ribs need to consult a doctor in time to avoid delaying the condition, do not self-medicate, but to be treated under the guidance of a physician’s interview.