<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have been treated for severe colitis,lately large bruises appeared on legs and arms, I accepted them because of my age 86 ,then the ones on my legs appeared with red blisters and severe itching,ice was the only relief I found,I treated the open lesions caused by scratching and there is some itching left.My legs feel hot and tight.Do I need to see a Dr? or continue to home treat?  <response>: 1. At your age 80, likely cause of red blisters could be bulbous phemphigoid BP which mainly affects people aged over 70, and since condition is autoimmune thus treatmentmanagement is required to control symptom.2. Colitis is one triggering factor for BP which is mentioned in your history3. Thus do not continue with home treatment apart from Chat Doctor. may cause serious infection if left untreated 