The white hard bump of the size of a finger cap in the buttock groove of a bedridden old man may be caused by lipoma, boils, pressure sores, etc., and he should consult a doctor in time to clarify the cause of the disease and then treat accordingly.
1. Lipoma: Lipoma formed by benign hyperplasia of fat cells can occur in the buttock groove, manifesting a hard bump of the size of a finger cap, usually with no other symptoms, and can be removed by surgery.
2. Boils: there are a certain number of hair follicles near the buttock groove, and when there is a hard white bump of the size of a nail cap accompanied by local pain, redness and pus, it should be considered to be caused by boils, which can be treated with topical mupirocin.
3. Pressure ulcers: the elderly lying on their backs for a long time may cause pressure ulcers in the buttock groove, manifested as hard bumps the size of fingernails, blisters, ulcers, and the companions of such elderly people should pay attention to turn over regularly, and in serious cases, carry out debridement of pressure ulcer sites.
The use of the above medications and treatments should be under the supervision of a physician.