My motherbis 59 yeas old. Last month, one morning she developed high bp, 160/100, it gradually dropped within evening to 140/90, the next morning it was again 160/100, bt this time within evening it dropped to 135/85, the next morning her bp was 140/95, and by the evening it dropped to 130/85, this trend continued and after 5 days her bp became normal. Now again this has has started since 2 days. The bp shows a declining trend with high in morning n gradually reducing towards evening. What may be the cause. Do we need to see a doctor. She has no history of bp, diabetes or any cvd. Her weight is 55 and height is 5' but she is reporting minor sleep disturbances. Please help.