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Thank you for the photographs. You do not have chronic cellulitis. Your history and clincal picture are typical of venous stasis eczema
. Varicose veins along with a rash like you have are typical signs of this condition. The tightness of skin in the involved area and the swelling above it is a complication of long standing venous disease and is known as lipodermatosclerosis
The problem with this condition is that is does not really improve till the underlying problem (venous blockage) is sorted out. This requires a Doppler ultrasound to determine the extent of the deep venous blockage due to DVT. Its great that you have already had this and the venous incompetence has been documented and the cause found (valve backflow). Depending on the extent of this surgery can be planned to address the problem.
In the meantime compression stockings are the way to go. They should be worn throughout the day everyday barring during sleeping hours.
Besides this keeping the area affected well moisturized and using elocon or 1% cortizone cream mixed with bacitracin ointment twice a day over the patches will help. Tab Claritin 10 mg twice a day will take care of the itching if present.
If there is pus discharge at any point this indicates an infection and needs oral antibiotics. Till you can get the antibiotics vinegar compresses will help - mix half a cup of white vinegar in a litre of tepid water, dip a clean cloth or gauze in it and spread over the affected area. Leave on for 5 minutes and then remove gently wiping off the crust/pus. Do this twice a day. This is not needed presently.
Tab Pentoxifylline 800 mg three times a day or Tab Calcium Dobesilate 500 mg three times a day are also helpful. Both require a prescription.
Hope this information is useful, please feel free to ask if you have any queries.