Brief Answer: This can be inflammation or allergy. Detailed Answer: Hello Welcome to Health care magic Iam Dr. Dadapeer K, an Ophthalmologist and I answer health problems related to eye. It seems from the history that your husband is having recurrent swelling of the eye lid involving the right eye and this is recurrent in nature. The swelling can be because of inflammation of the gland of the eyelids or because of allergic affection. Since it is present in only one eye it is not because of systemic problems. Coming to the differentiation, if the swelling is associated with inflammatory symptoms like pain, redness... it is because of inflammation of the glands of the eyelids like hordeolum externum or internum. The treatment of the condition is by using oral antiinflammatory drugs, antibiotic eye ointment and hot compression applied to the local swelling area. If the swelling is diffuse and associated with itching in the absence of pain, it can be because of allergies and the treatment is by using antiallergic drugs and cold compression. Both the above mentioned causes are typically recurrent in nature. Hence you can start the treatment depending on the above mentioned two common causes and if the condition is not responding to treatment do consult your doctor for examination and treatment accordingly. Thank you

---