What Causes Abnormal Heart Beats After Taking Medicines For Scab?

I am concerned about scabs that have appeared on my fore arms and have not gone away in overf a month. I have had similar small annoying bumps or scabs on the back of my head for years. they seem to come and go. I have read a lot more about candida and think this may be the cause. The scabs on my arms only seem to improve when I am taking a really good probiotic and using anti fungal cream on my arms several times a day. I think this may have been building for years as I have been on many courses of antibiotics over the years mostly the Z Pack for sinus infections. My diet has become worse over the years and I seem to crave sugar and starchy carbs all the time. I will often get really itchy all over after eating sweets or fast food lately. The scab on my arms are different then a bite or a normal scab. they seem to be really deeply embeded and they dont ever heal and come off like a normal scab. After starting probiotics and using lotramine on my arms everyday I also stated noticing a funny heart beat that makes me feel like I cant breath or I need to take a deep breath

any help?